阅读说明：本技术 一种光伏汇流箱逆变器电容降温装置 (Photovoltaic conflux case dc-to-ac converter electric capacity heat sink ) 是由 张瑗 于 2019-09-20 设计创作，主要内容包括：本发明涉及光伏技术领域,且公开了一种光伏汇流箱逆变器电容降温装置,包括箱体、电路板、电容体,所述箱体的内壁安装有防水层,所述防水层的顶部安装有套管,所述套管的内圈处套接有硅胶套,所述硅胶套的内部填充有膨胀液。通过防水层与硅胶套之间的配合,使得电容上的热量及时传输至防水层,使得膨胀液根据电容的温度自适应膨胀和伸缩,从而将蓄水棒上的冷却液滴落至防水层上,再通过防水层将电容温度降低,使得冷却液快速与电容接触,消除电容上的高温,使得逆变器腔体内保持较佳的工作环境,使得电容始终保持一个适宜的状态下工作,使得电容每下降10℃寿命翻倍,从而增加电容在使用时的寿命,使得逆变器在使用中更加稳定。(The invention relates to the technical field of photovoltaics, and discloses a photovoltaic combiner box inverter capacitor cooling device which comprises a box body, a circuit board and a capacitor body, wherein a waterproof layer is installed on the inner wall of the box body, a sleeve is installed at the top of the waterproof layer, a silica gel sleeve is sleeved at the inner ring of the sleeve, and expansion liquid is filled in the silica gel sleeve. Through the cooperation between waterproof layer and the silica gel cover, make the heat on the electric capacity in time transmit to the waterproof layer, make the inflation liquid according to the temperature self-adaptation inflation and the flexible of electric capacity, thereby drip the coolant liquid on the retaining stick to the waterproof layer, rethread waterproof layer reduces the electric capacity temperature, make the coolant liquid contact with the electric capacity fast, eliminate the high temperature on the electric capacity, make the operational environment who keeps the preferred in the dc-to-ac converter cavity, make the electric capacity work under keeping an appropriate state all the time, make every 10 ℃ of decline life-span of electric capacity double, thereby increase the life-span of electric capacity when using, make the dc-to-ac converter in use more stable.)

1. The utility model provides a photovoltaic collection flow box dc-to-ac converter electric capacity heat sink, includes that box (1), circuit board (2), electric capacity body (3), circuit board (2) install the inboard bottom at box (1), and electric capacity body (3) welding is at the top of circuit board (2), its characterized in that: a waterproof layer (4) is arranged on the inner wall of the box body (1), a sleeve (5) is arranged on the top of the waterproof layer (4), a silica gel sleeve (6) is sleeved at the inner ring of the sleeve (5), the silica gel sleeve (6) is filled with expansion liquid (7), two ends of the expansion liquid (7) are fixedly connected with sliding blocks (8), the end parts of the sliding blocks (8) are fixedly connected with positioning seats (9), the inner wall of the positioning seat (9) is rotatably connected with a sliding rod (10), a positioning plate (11) is arranged on the sliding rod (10), a support rod (12) is arranged on the inner wall of the box body (1), the positioning plate (11) is rotatably connected with the end part of the support rod (12), the end part of the positioning plate (11) is fixedly connected with a supporting block (13), and the side surface of the supporting block (13) is fixedly connected with a water storage rod (14).

2. The photovoltaic combiner box inverter capacitor cooling device of claim 1, wherein: a plurality of through holes (20) are formed in the sleeve (5), the position of the center of the inner ring of the sleeve (5) is bonded with the position of the center of the outer ring of the silica gel sleeve (6), the silica gel sleeve (6) is made of elastic silica gel, the expansion liquid (7) is made of mercury, and the expansion liquid (7) moves axially along the silica gel sleeve (6).

3. The photovoltaic combiner box inverter capacitor cooling device of claim 1, wherein: the waterproof layer (4) is concave, the length of the concave part of the waterproof layer (4) is larger than the total length of the plurality of capacitor bodies (3), and the bottom of the waterproof layer (4) is in contact with the top of the capacitor bodies (3).

4. The photovoltaic combiner box inverter capacitor cooling device of claim 1, wherein: two fixedly connected with flow distribution plate (15) between locating plate (11), flow distribution hole (16) have been seted up on flow distribution plate (15), the material of flow distribution plate (15) is elastic rubber.

5. The photovoltaic combiner box inverter capacitor cooling device of claim 1, wherein: the top fixedly connected with sliding sleeve (17) of retaining stick (14), water tank (19) are installed at the top of box (1), the bottom intercommunication of water tank (19) has honeycomb duct (18), the material of sliding sleeve (17) is the magnetism piece, the position of honeycomb duct (18) bottom is the magnetism piece, the top of sliding sleeve (17) and the bottom magnetism of honeycomb duct (18) are the different grade looks state of inhaling, sliding sleeve (17) and honeycomb duct (18) are inhaled the dynamics mutually and are less than the crooked dynamics of retaining stick (14), and the inside water content of retaining stick (14) is 80%.

Technical Field

The invention relates to the technical field of photovoltaics, in particular to a capacitor cooling device for a photovoltaic combiner box inverter.

Background

Photovoltaic inverters are inverters that convert variable dc voltage produced by Photovoltaic (PV) solar panels into mains frequency Alternating Current (AC), which can be fed back to a commercial power transmission system or used by an off-grid power grid.

If the alternating current output by the inverter tends to be stable, mainly depending on a capacitor, the capacitor in the inverter is used for forming an oscillating circuit, generating alternating current with a certain frequency, filtering out alternating current with other frequencies and preventing noise waves, the existing inverter capacitor heat dissipation mode is natural heat dissipation and forced air cooling, the natural cooling can bear the heat flux density of 0.05W/cm2 to the maximum extent, the forced air cooling can bear the heat flux density of more than 0.05W/cm2, the forced air cooling heat dissipation mode mainly discharges heat inside the inverter through a fan, the fan can generate a certain temperature when rotating, and a bearing connected with fan blades is influenced by the temperature, so that the inside is easy to generate dirt, the resistance of the fan when rotating is increased, the fan is damaged when the fan is serious, and the heat dissipation effect cannot be achieved.

When the inverter capacitor is used, because the current of the inverter capacitor is larger, under the continuous action of an applied voltage, the thin film at the electric weakness is firstly broken to form a discharge channel, when the thin film is broken, electric charges form large current through a breakdown point to cause local high temperature, the capacitance value of the capacitor is continuously reduced, when the capacitance value of the capacitor exceeds 5 percent of the initial capacitance value, the capacitance value of the capacitor does not meet the requirement any more, degradation and failure occur, in addition, the installation environment of the inverter is worse, when the inverter continuously works, heat generated by the operation of internal components is always gathered in a cavity, the internal temperature of the inverter is higher and higher, the volatilization loss of capacitor electrolyte is accelerated when the temperature is higher, particularly, the temperature of the components such as the electrolytic capacitor and an optical coupler is increased by 10 ℃, the service life of the electrolytic capacitor is reduced by half, and when the electrolytic capacitor is at 105 ℃, the service, the service life of the capacitor is reduced due to only 5000-6000H, so that the material on the surface of the capacitor is sintered, the capacitor is burned out in serious conditions, and the inverter cannot be used continuously, thereby influencing the stability of the inverter in a working state.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the photovoltaic combiner box inverter capacitor cooling device which has the advantages of prolonging the service life of a capacitor and automatically cooling according to the temperature of the capacitor, and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides a photovoltaic conflux case dc-to-ac converter electric capacity heat sink, includes that box, circuit board, electric capacity body, circuit board are installed in the inboard bottom of box, and the electric capacity body welding is at the top of circuit board, the waterproof layer is installed to the inner wall of box, the sleeve pipe is installed at the top of waterproof layer, the silica gel cover has been cup jointed to sheathed tube inner circle department, the inside packing of silica gel cover has the inflation liquid, the both ends fixedly connected with sliding block of inflation liquid, the tip fixedly connected with positioning seat of sliding block, the inner wall of positioning seat rotates and is connected with the slide bar, install the locating plate on the slide bar, the bracing piece is installed to the inner wall of box, the locating plate rotates with the tip of bracing piece to be connected, the tip fixedly.

Preferably, a plurality of through holes are formed in the sleeve, the position of the center of the inner ring of the sleeve is bonded with the position of the center of the outer ring of the silica gel sleeve, the silica gel sleeve is made of elastic silica gel, the expansion liquid is made of mercury, and the expansion liquid moves axially along the silica gel sleeve.

Preferably, the waterproof layer is concave, the length of the concave part of the waterproof layer is larger than the sum of the lengths of the plurality of capacitor bodies, and the bottom of the waterproof layer is in contact with the top of the capacitor bodies.

Preferably, a splitter plate is fixedly connected between the two positioning plates, splitter holes are formed in the splitter plate, and the splitter plate is made of elastic rubber.

Preferably, the top fixedly connected with sliding sleeve of the stick that impounds, the water tank is installed at the top of box, the bottom intercommunication of water tank has the honeycomb duct, the material of sliding sleeve is the magnetism piece, the position of honeycomb duct bottom is the magnetism piece, the top of sliding sleeve and the bottom magnetic pole of honeycomb duct are the different grade looks state of inhaling, the dynamics that sliding sleeve and honeycomb duct inhaled mutually is less than the crooked dynamics of stick that impounds, and the inside water content of stick that impounds is 80%.

The invention has the following beneficial effects:

1. this photovoltaic conflux case dc-to-ac converter electric capacity heat sink, cooperation between waterproof layer and the silica gel cover is passed through, make the heat on the electric capacity in time transmit to the waterproof layer, make the inflation liquid according to the temperature self-adaptation inflation and the flexible of electric capacity, thereby with the coolant liquid drippage on the retaining stick to the waterproof layer, the rethread waterproof layer reduces the electric capacity temperature, make the coolant liquid contact with the electric capacity fast, eliminate the high temperature on the electric capacity, make the operational environment who keeps the preferred in the inverter cavity, make the electric capacity work under keeping an appropriate state throughout, make the electric capacity every 10 ℃ of decline life-span double, thereby increase the life-span of electric capacity when using, make the inverter in use more stable.

2. This photovoltaic conflux case dc-to-ac converter electric capacity heat sink, effect through locating plate and flow distribution plate, make the temperature self-adaptation that the retaining stick produced according to electric capacity crooked, thereby control the retaining stick rivers flow, make the coolant liquid according to the temperature self-adaptation of electric capacity appropriate amount coolant liquid that drips, simultaneously rethread flow distribution plate and flow distribution hole, evenly drip the coolant liquid on the waterproof board, reduce the electric capacity temperature, magnetic force fit between rethread sliding sleeve and the honeycomb duct, when making the retaining stick crooked, control rivers are opened to the honeycomb duct, when the retaining stick resumes, sliding sleeve shutoff honeycomb duct, make whole flow automation, it is intelligent, further increase the stability of electric capacity body at the during operation, increase the life-span of electric capacity body.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the expanded state structure;

FIG. 3 is a schematic view of a partial side view of a waterproof layer;

fig. 4 is a schematic diagram of a conventional structure.

In the figure: 1. a box body; 2. a circuit board; 3. a capacitor body; 4. a waterproof layer; 5. a sleeve; 6. a silica gel sleeve; 7. an expansion fluid; 8. a slider; 9. positioning seats; 10. a slide bar; 11. positioning a plate; 12. a support bar; 13. a support block; 14. a water storage rod; 15. a flow distribution plate; 16. a shunt hole; 17. a sliding sleeve; 18. a flow guide pipe; 19. a water tank; 20. and a through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a photovoltaic combiner box inverter capacitor cooling device includes a box body 1, a circuit board 2, a capacitor body 3, and a circuit board 2 installed at the bottom of the inner side of the box body 1, the capacitor body 3 is welded at the top of the circuit board 2, a waterproof layer 4 is installed on the inner wall of the box body 1, the waterproof layer 4 is a high temperature resistant waterproof layer with a smooth surface, a sleeve 5 is installed at the top of the waterproof layer 4, a silica gel sleeve 6 is sleeved at the inner ring of the sleeve 5, the silica gel sleeve 6 is a high temperature resistant silica gel to increase the service life of the silica gel when in use, an expansion liquid 7 is filled in the silica gel sleeve 6, sliding blocks 8 are fixedly connected at the two ends of the expansion liquid 7, positioning seats 9 are fixedly connected at the end of the sliding blocks 8, and a sliding rod 10 is rotatably connected between the two, the angle of opening and shutting of locating plate 11 is convenient for control, the inner wall of positioning seat 9 rotates and is connected with slide bar 10, install locating plate 11 on the slide bar 10, bracing piece 12 is installed to the inner wall of box 1, increases slide bar 10 stability when rotating, locating plate 11 rotates with the tip of bracing piece 12 and is connected, the tip fixedly connected with supporting shoe 13 of locating plate 11, the side fixedly connected with retaining rod 14 of supporting shoe 13, retaining rod 14 are sponge or other retaining cotton-shaped thing.

Wherein, the sleeve 5 is provided with a plurality of through holes 20 for facilitating the flow of cooling liquid drops to the silica gel sleeve 6 through the through holes 20, the temperature of the expansion liquid 7 is reduced by the cooling liquid, so that the expansion liquid 7 returns to the initial position, the expansion liquid 7 is facilitated to induce the temperature on the waterproof layer 4 again, the expansion liquid 7 automatically expands and contracts in real time according to the temperature on the waterproof layer 4, the temperature of the capacitor body 3 is facilitated to be controlled, the capacitor body 3 is enabled to work in a stable environment all the time, the service life of the capacitor body 3 is prolonged, meanwhile, the temperature generated on the capacitor body 3 can evaporate the moisture on the waterproof layer 4, the surface of the capacitor body 3 is enabled to keep a dry degree all the time, the position at the center of the inner ring of the sleeve 5 is mutually bonded with the position at the center of the outer ring of the silica gel sleeve 6, the material of the silica gel sleeve 6 is elastic silica gel, the material of the, so that the expansion liquid 7 can only move along the axial direction of the silica gel sleeve 6, and the positioning seat 9 is convenient to drive to move towards two sides.

The waterproof layer 4 is concave, the length of the concave part of the waterproof layer 4 is larger than the sum of the lengths of the plurality of capacitor bodies 3, the bottom of the waterproof layer 4 is in contact with the top of the capacitor bodies 3, so that the expansion liquid 7 keeps moving axially when expanding, meanwhile, the cooling liquid drops fall on the waterproof layer 4 conveniently, the capacitor bodies 3 are cooled, meanwhile, the temperature on the capacitor bodies 3 is quickly transferred to the waterproof layer 4 conveniently, the thickness of the waterproof layer 4 is 2-4 mm, and the temperature is transmitted conveniently in time.

Wherein, two fixedly connected with flow distribution plate 15 between locating plate 11, flow distribution hole 16 has been seted up on flow distribution plate 15, flow distribution plate 15's material is elastic rubber for flow distribution plate 15 can crooked different angle, after flow distribution plate 15 is extrudeed by locating plate 11 and is crooked, flow distribution hole 16 on flow distribution plate 15 is extruded and is diminished, thereby the outflow of control coolant liquid, after flow distribution plate 15's shape resumes gradually, the coolant liquid is along with flow distribution hole 16 and drip downwards gradually, reduces the temperature of capacitance body 3.

Wherein, the top of the water storage rod 14 is fixedly connected with a sliding sleeve 17, the top of the box body 1 is provided with a water tank 19, the cooling liquid in the water tank 19 can be cooling water or normal temperature water, wherein the cooling water effect is better, the bottom of the water tank 19 is communicated with a flow guide pipe 18, the sliding sleeve 17 is made of a magnetic block, the bottom of the flow guide pipe 18 is a magnetic block, the top of the sliding sleeve 17 and the bottom of the flow guide pipe 18 are in a different-level attraction state, so that the sliding sleeve 17 can control the outflow of the flow guide pipe 18, when the water storage rod 14 is bent, the sliding sleeve 17 leaves the flow guide pipe 18, when the water storage rod 14 is restored to the original state, the sliding sleeve 17 closes the flow guide pipe 18, so that the whole flow is more intelligent, the water content on the water storage rod 14 does not need to be manually controlled, so that the inverter and the capacitor body 3 always keep a proper working state when working, and the force of the, and the water content in the water storage rod 14 is 80%, so that the water flow is conveniently extruded.

The working principle is that after the inverter and the capacitor body 3 are used for a period of time, the capacitor body 3 generates a certain amount of heat, the generated heat is transmitted to the silica gel sleeve 6 through the waterproof layer 4, then the expansion liquid 7 in the silica gel sleeve 6 starts to expand towards two sides to drive the positioning seat 9 to move towards two sides, then the positioning plate 11 starts to move towards the inner side due to the moving force, then the supporting block 13 is driven to squeeze the water storage rod 14 towards the inner side to drive the sliding sleeve 17 to be separated from the flow guide pipe 18, the cooling liquid supplements the water content of the water storage rod 14 through the flow guide pipe 18, then the cooling liquid in the water storage rod 14 falls onto the flow distribution plate 15, the cooling liquid is uniformly diffused onto the waterproof layer 4 through the flow distribution holes 16, the cooling liquid falls onto the silica gel sleeve 6 and the waterproof layer 4, then the expansion liquid 7 shrinks due to the influence of the temperature to drive the, so that the water storage rod 14 is restored, the sliding sleeve 17 is used for continuously plugging the guide pipe 18, the cooling temperature on the waterproof layer 4 is transmitted to the capacitor body 3, and the temperature on the capacitor body 3 is reduced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.