Protective device for photovoltaic inverter

Abstract

The utility model discloses a protective device for a photovoltaic inverter, which comprises a protective shell and a plurality of protective plates, and the plurality of protective plates are respectively clamped and mounted on two sides, the rear end and the top of the protective shell and are used for safety protection of a photovoltaic inverter body in the protective shell. The front end of the protection plate is provided with a plurality of fin plates, and the plurality of fin plates are arranged in parallel and at intervals, and are used for increasing the contact area between the protection plate and hot air emitted by a photovoltaic inverter body installed in the protection housing. A plurality of fin plates are arranged on the inner side of each protection plate, so that the contact area between the protection plates and hot air emitted by a photovoltaic inverter body installed in the protection shell is increased through the plurality of fin plates, and water cooling liquid output by a water cooling mechanism fully dissipates heat of high temperature generated by operation of the photovoltaic inverter body. And the operation efficiency of the photovoltaic inverter is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of protection device, specifically relates to a protection device for photovoltaic inverter. BACKGROUND

[0002] The inverter is the direct current electric energy into alternating current. It is composed of inverter bridge, control logic and filter circuit. In recent years, in order to advocate new energy power generation, the construction of photovoltaic power station is more and more extensive, because the electric energy generated by photovoltaic panel is direct current, it is not convenient to transmit electric energy, therefore, install inverter can convert the direct current generated by photovoltaic panel into alternating current, facilitate the transmission of electric energy, the existing inverter when using, because the installation position of photovoltaic panel is special, the inverter needs to be exposed in the region with sufficient light for a long time, the temperature of the inverter rises, which affects the service life of the inverter.

[0003] The existing photovoltaic inverter protection device (application number 202220791273.2, a safety protection device for photovoltaic power station inverter), by setting up the protective shell outside the inverter, and setting up the heat dissipation assembly on the protective shell, and then the safety protection of the inverter is carried out, but the protective shell of the inverter will bring the water vapor molecules and dust in the air into the protective shell in the process of using air cooling, and then affect the normal use of the inverter, without using the protective plate that can carry out water cooling and heat preservation, the safety protection of the inverter installed in the protective shell is carried out at the same time, and the water cooling or low temperature heat preservation is carried out, which affects the normal use of the photovoltaic inverter. UTILITY MODEL CONTENTS

[0004] In view of the above defects or deficiencies in the prior art, it is expected to provide a photovoltaic inverter protection device, to solve the technical problems that the existing photovoltaic inverter protection device does not use the protective plate that can carry out water cooling and heat preservation, the safety protection of the inverter installed in the protective shell is carried out at the same time, and the water cooling or low temperature heat preservation is carried out, which affects the normal use of the photovoltaic inverter.

[0005] According to the technical scheme provided by the embodiment of the application, a photovoltaic inverter protection device is provided, which comprises a protective shell and a plurality of protective plates, the plurality of protective plates are respectively connected and installed on both sides, the rear end and the top of the protective shell, and are used for the safety protection of the photovoltaic inverter body in the protective shell.

[0006] The front end of the protective plate is provided with a plurality of fin plates, and the plurality of fin plates are arranged side by side and spaced apart, for increasing the contact area of the hot air emitted by the photovoltaic inverter body installed in the protective shell and the protective plate.

[0007] The water cooling mechanism and the warm keeping mechanism are installed in parallel and at intervals in the case at the bottom of the protective shell, and the water cooling mechanism and the warm keeping mechanism are connected with the liquid inlet pipe and the liquid outlet pipe on each protective plate through the output pipe and the input pipe respectively, so that the water cooling liquid or the warm keeping liquid is input into each protective plate respectively, and the photovoltaic inverter body installed in the protective shell is water cooled and radiated or kept warm at low temperature.

[0008] Further, several wing plates are installed on the inner side of the protective plate, and the inner part of the protective plate is in a cavity structure for input of the water cooling liquid or the warm keeping liquid.

[0009] Further, the water cooling mechanism comprises a water tank, a first water outlet pipe and a first water inlet pipe, the water tank is provided with a first water cooling cavity and a first recovery cavity, the first water outlet pipe is connected with the first water cooling cavity, and the first water inlet pipe is connected with the first recovery cavity.

[0010] Further, a valve is arranged between the first water cooling cavity and the first recovery cavity, for input of the water cooling liquid recovered by the first recovery cavity into the first water cooling cavity.

[0011] Further, a first replenishing pipe is further arranged on the first water cooling cavity, for replenishment of the water cooling liquid in the water tank.

[0012] Further, the warm keeping mechanism comprises a warm keeping tank, a second water outlet pipe and a second water inlet pipe, the warm keeping tank is provided with a second heating cavity and a second recovery cavity, the second water outlet pipe is connected with the second heating cavity, and the second water inlet pipe is connected with the second recovery cavity.

[0013] Further, a second replenishing pipe is arranged on the second heating cavity, for replenishment of the warm keeping liquid in the warm keeping tank.

[0014] Further, valves corresponding to the first water outlet pipe, the first water inlet pipe, the second water outlet pipe and the second water inlet pipe are installed, and the valves are electromagnetic valves for controlling opening and closing of the corresponding pipes.

[0015] Further, valves are installed on the first replenishing pipe and the second replenishing pipe, for controlling opening and closing of the first replenishing pipe and the second replenishing pipe.

[0016] In summary, the beneficial effects of the present application are as follows:

[0017] I. By setting the traditional integrated structure protective shell into a detachable structure, when the protective plate of the protective shell is damaged, the protective plate can be timely disassembled and replaced, thereby improving the safety protection efficiency of the protective device on the photovoltaic inverter.

[0018] Second, by setting several fins on the inner side of each protective plate, the contact area between the protective plate and the photovoltaic inverter body installed inside the protective shell is increased, so that the coolant output by the water cooling mechanism can fully dissipate the high temperature generated by the operation of the photovoltaic inverter body, thereby improving the operating efficiency of the photovoltaic inverter.

[0019] Third, by installing a water-cooling mechanism and a heat-insulating mechanism at the bottom of the protective casing, the water-cooling mechanism and the heat-insulating mechanism are connected to the cavity on the protective plate through output pipes and input pipes, respectively. This allows the coolant or heat-insulating liquid to be delivered to each protective plate. In hot weather, the coolant flowing through the protective plate dissipates the high temperature generated by the photovoltaic inverter body installed inside the protective casing. In cold weather, the heat-insulating liquid flowing through the protective plate maintains a constant temperature for the protective casing, thereby enabling the photovoltaic inverter body to operate normally in low-temperature weather and improving the operating efficiency of the photovoltaic inverter. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is an exploded structural diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the protective plate of this utility model.

[0024] Figure 4 This is a cross-sectional structural diagram of the water-cooling mechanism and the heat-insulating mechanism of this utility model.

[0025] The following are the labels in the diagram: Protective outer shell - 100, Protective plate - 200, Fin plate - 210, Liquid inlet pipe - 211, Liquid outlet pipe - 212, Water cooling mechanism - 300, Water tank - 310, First water cooling chamber - 311, First recovery chamber - 312, First water outlet pipe - 320, First water inlet pipe - 330, First supply pipe - 340, Heating mechanism - 400, Heating box - 410, Second heating chamber - 411, Second recovery chamber - 412, Second water outlet pipe - 420, Second water inlet pipe - 430, Second supply pipe - 440. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] A protective device for a photovoltaic inverter, the structure of which is as follows: Figures 1-4 As shown, the system includes a protective housing 100 and several protective plates 200. The protective plates 200 are respectively snap-fitted onto the sides, rear end, and top of the protective housing 100, allowing the split-structure protective housing 100 to replace the original integrated structure. This prevents damage to the protective housing 100 from requiring complete replacement of the entire housing; only the damaged protective plate 200 needs to be replaced, reducing resource waste and improving the safety protection efficiency of the photovoltaic inverter body inside the protective housing 100. Each protective plate 200 has several fins 210 arranged side-by-side and spaced apart. These fins increase the heat dissipation between the protective plate 200 and the photovoltaic inverter body installed inside the protective housing 100. The air contact area is increased to allow the photovoltaic inverter installed inside the protective enclosure 100 to dissipate heat quickly, thereby improving the normal operating efficiency of the photovoltaic inverter installed inside the protective enclosure 100. The water cooling mechanism 300 and the heat preservation mechanism 400 are installed side by side and spaced apart in the chassis at the bottom of the protective enclosure 100. The water cooling mechanism 300 and the heat preservation mechanism 400 are respectively connected to the liquid inlet pipe 211 and liquid outlet pipe 212 on each protective plate 200 through the output pipe and the input pipe, respectively, so that the coolant or heat preservation liquid is respectively introduced into each protective plate 200, thereby water cooling or low temperature heat preservation of the photovoltaic inverter body installed inside the protective enclosure 100, thereby improving the normal operating efficiency of the photovoltaic inverter installed inside the protective enclosure 100.

[0029] As a preferred embodiment, please refer to Figure 3 Several fins 210 are installed inside the protective plate 200. The protective plate 200 and the several fins 210 have a cavity structure so that coolant or heat-insulating liquid is introduced into the protective plate 200 from the inlet pipe 211. The coolant or heat-insulating liquid flows through the protective plate 200 and heats or insulates the photovoltaic inverter installed inside the protective shell 100. The cooled or heat-insulating liquid is then output from the outlet pipe 212.

[0030] As a preferred embodiment, please refer to Figure 4The water-cooling mechanism 300 includes a water tank 310, a first outlet pipe 320, and a first inlet pipe 330. The water tank 310 contains a first water-cooling chamber 311 and a first recovery chamber 312. The first outlet pipe 320 is connected to the first water-cooling chamber 311, and the first inlet pipe 330 is connected to the first recovery chamber 312. During high-temperature seasons, the water-cooling mechanism 300, installed in the bottom chassis of the protective housing 100, is activated, causing the water pump in the first water-cooling chamber 311 to start. This pump outputs low-temperature coolant from the first outlet pipe 320. The coolant enters the output pipe and then flows into the protective cavities of each protective plate 200, so that when the coolant flows through the inner cavity of the protective plate 200, it interacts with the light source installed inside the protective housing 100. The high temperature generated by the photovoltaic inverter is exchanged for heat, thereby dissipating heat from the photovoltaic inverter in a timely manner. The cooled water after heat exchange is transported from the input pipe to the first water inlet pipe 330 and recycled into the first recovery chamber 312. The recycled cooled water is filtered and then re-enters the first cooling chamber for cooling, and is then reintroduced into each protective plate 200 so that the cooled water circulates through each protective plate 200 to dissipate heat from the photovoltaic inverter installed in the protective shell 100, thereby improving the normal operating efficiency of the photovoltaic inverter installed in the protective shell 100. At the same time, the first water cooling chamber 311 is also provided with a first replenishment pipe 340 so that the cooled water in the water tank 310 is replenished in a timely manner when the cooled water in the water tank 310 is insufficient.

[0031] As a preferred embodiment, please refer to Figure 4 The heat preservation mechanism 400 includes a heat preservation box 410, a second water outlet pipe 420, and a second water inlet pipe 430. The heat preservation box 410 contains a second heating chamber 411 and a second recovery chamber 412. The second water outlet pipe 420 is connected to the second heating chamber 411, and the second water inlet pipe 430 is connected to the second recovery chamber 412. During cold seasons, the heat preservation mechanism 400, installed in the bottom casing of the protective housing 100, is activated, causing the water pump in the second heat preservation chamber on the heat preservation mechanism 400 to start. This pump outputs high-temperature heat preservation liquid from the second water outlet pipe 420 and into the output pipe, which then flows into the protective chambers of each protective plate 200, allowing the heat preservation liquid to flow through the inner cavity of the protective plate 200. During operation, the protective casing 100 is insulated to ensure that the photovoltaic inverter inside the protective casing 100 operates in a constant temperature environment. The insulating liquid is transported from the input pipe to the second water inlet pipe 430 and recycled into the second recovery chamber 412. After being filtered, the recycled insulating liquid re-enters the second insulating chamber for heating and then circulates into each protective plate 200 to provide circulating insulation for the inside of the protective casing 100, thereby improving the normal operating efficiency of the photovoltaic inverter installed inside the protective casing 100. At the same time, a second supply pipe 440 is provided on the second heating chamber 411 to replenish the insulating liquid in the insulating box 410 in a timely manner.

[0032] As a preferred embodiment, please refer to Figure 4 The first outlet pipe 320, the first inlet pipe 330, the second outlet pipe 420, and the second inlet pipe 430 are each equipped with a corresponding valve, which is a solenoid valve. This valve allows the protective housing 100 to be cooled during hot weather by opening the valves on the first outlet pipe 320 and the first inlet pipe 330, allowing coolant to flow through the protective plates 200 and thus dissipate heat from the photovoltaic inverter installed inside the protective housing 100. During cold weather, the valves on the second outlet pipe 420 and the second inlet pipe 430 are opened, allowing the coolant to flow through the protective plates 200 and thus dissipate heat from the photovoltaic inverter installed inside the protective housing 100. The warm liquid flows through each protective plate 200, thereby warming the photovoltaic inverter installed inside the protective shell 100 to ensure its normal operation, thus improving the protection efficiency and quality of the protective device. At the same time, corresponding valves are installed on the first supply pipe 340 and the second supply pipe 440 to control the opening and closing of the first supply pipe 340 and the second supply pipe 440, so that the first supply pipe 340 and the second supply pipe 440 can replenish the coolant and warming liquid in the water tank 310 and the insulation box 410 in a timely manner.

[0033] The working principle of the protective device for photovoltaic inverters of this utility model is as follows:

[0034] In the process of providing safety protection for photovoltaic inverters, traditional protective devices use an integrated protective housing 100. This means that if the housing 100 is damaged, the entire unit needs to be replaced, affecting the efficiency of the protection. By making the protective housing 100 a detachable structure, the protective plate 200 can be promptly removed and replaced if damaged, thus improving the efficiency of the protection and reducing resource waste. Furthermore, the protective plate 200 is designed as a hollow structure with an inlet pipe 211 and an outlet pipe 212, connecting the inlet pipe 211 to the outlet pipe. The outlet pipe 212 is connected to the inlet pipe. During high-temperature seasons, the water-cooling mechanism 300 installed in the bottom chassis of the protective housing 100 is activated, causing the water pump in the first water-cooling chamber 311 on the water-cooling mechanism 300 to start. This causes the low-temperature coolant to be output from the first outlet pipe 320, then enter the outlet pipe, and from the outlet pipe into the protective chambers of each protective plate 200. This allows the coolant to exchange heat with the high temperature generated by the photovoltaic inverter installed inside the protective housing 100 as it flows through the inner cavity of the protective plate 200, thus dissipating heat from the photovoltaic inverter in a timely manner. The cooled coolant after heat exchange is then transported from the inlet pipe to the first inlet pipe 330 and recycled into the first recycling chamber 312. The recycled coolant is then filtered. After re-entering the first cooling chamber for cooling, the fluid is circulated into each protective plate 200 to improve the protection efficiency of the protective device. During cold seasons, the heating mechanism 400 installed in the bottom casing of the protective housing 100 is activated, causing the water pump in the second heating chamber on the heating mechanism 400 to start. This pump outputs high-temperature insulating fluid from the second outlet pipe 420, into the outlet pipe, and then into the protective chambers of each protective plate 200. As the insulating fluid flows through the inner cavity of the protective plate 200, it heats the protective housing 100, allowing the photovoltaic inverter inside the protective housing 100 to operate in a constant temperature environment. Meanwhile, the insulating fluid is transported from the inlet pipe to the second inlet pipe 430 and recycled. The recovered insulating liquid is stored in the second recovery chamber 412. After filtration, it re-enters the second insulation chamber for heating and then circulates into each protective plate 200 to insulate the interior of the protective shell 100, thereby improving the normal operating efficiency of the photovoltaic inverter installed inside the protective shell 100. Several fins 210 are provided on the inner side of each protective plate 200 to increase the contact area between the protective plate 200 and the hot air emitted by the photovoltaic inverter body installed inside the protective shell 100. This allows the cooling liquid output by the water cooling mechanism 300 to fully dissipate the high temperature generated by the operation of the photovoltaic inverter body, thereby improving the normal operating efficiency of the photovoltaic inverter installed inside the protective shell 100.

[0035] The above description is merely a preferred embodiment of this application and an explanation of the technical principles and solutions employed. Furthermore, the scope of the utility model involved in this application is not limited to the specific combination of the above-described technical features, but should also cover other technical solutions formed by any combination of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A protective device for a photovoltaic inverter, comprising a protective housing (100) and a plurality of protective plates (200), wherein the plurality of protective plates (200) are respectively snapped onto the sides, rear end and top of the protective housing (100) for safety protection of the photovoltaic inverter body inside the protective housing (100), characterized in that: The protective plate (200) has a number of fins (210) at its front end, and the fins (210) are arranged side by side and spaced apart, which is used to increase the contact area between the protective plate (200) and the hot air emitted by the photovoltaic inverter body installed in the protective shell (100). The water cooling mechanism (300) and the heat preservation mechanism (400) are installed side by side and spaced apart in the chassis at the bottom of the protective shell (100). The water cooling mechanism (300) and the heat preservation mechanism (400) are respectively connected to the liquid inlet pipe (211) and liquid outlet pipe (212) on each of the protective plates (200) through the output pipe and the input pipe, so that the water cooling liquid or heat preservation liquid is respectively input into each of the protective plates (200), thereby performing water cooling heat dissipation or low temperature heat preservation on the photovoltaic inverter body installed in the protective shell (100).

2. The protective device for a photovoltaic inverter according to claim 1, characterized in that: Several of the fins (210) are installed inside the protective plate (200), and the protective plate (200) has a hollow structure inside for the input of coolant or heat-insulating liquid.

3. The protective device for a photovoltaic inverter according to claim 1, characterized in that: The water cooling mechanism (300) includes a water tank (310), a first water outlet pipe (320) and a first water inlet pipe (330). The water tank (310) is provided with a first water cooling chamber (311) and a first recovery chamber (312). The first water outlet pipe (320) is connected to the first water cooling chamber (311), and the first water inlet pipe (330) is connected to the first recovery chamber (312).

4. A protective device for a photovoltaic inverter according to claim 3, characterized in that: A valve is provided between the first water-cooling chamber (311) and the first recovery chamber (312) for inputting the water-cooling liquid recovered from the first recovery chamber (312) into the first water-cooling chamber (311).

5. A protective device for a photovoltaic inverter according to claim 3, characterized in that: The first water-cooling cavity (311) is also provided with a first supply pipe (340) for replenishing the coolant in the water tank (310).

6. A protective device for a photovoltaic inverter according to claim 1, characterized in that: The heat preservation mechanism (400) includes a heat preservation box (410), a second water outlet pipe (420) and a second water inlet pipe (430). The heat preservation box (410) is provided with a second heating chamber (411) and a second recovery chamber (412). The second water outlet pipe (420) is connected to the second heating chamber (411), and the second water inlet pipe (430) is connected to the second recovery chamber (412).

7. A protective device for a photovoltaic inverter according to claim 6, characterized in that: The second heating chamber (411) is provided with a second supply pipe (440), which is used to supply the insulating liquid in the insulating box (410).

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