Inverter and centralized inverter

Abstract

The utility model relates to an inverter and a centralized inverter. The inverter comprises a cabinet body, various devices are installed in the cabinet body, two opposite side walls of the cabinet body are respectively provided with a first group of shutters and a second group of shutters, the first group of shutters and the second group of shutters form air convection, and ventilation, heat dissipation and cooling of the devices are facilitated. The centralized inverter comprises a box body and inverter groups comprising inverters, the inverter groups are respectively arranged at two sides in the box body so that the box body forms an air channel along the front and back direction, the second group of shutters face the air channel, the first group of shutters are close to the side wall of the box body, the side wall of the box body is provided with a third group of shutters, and the third group of shutters are close to the air channel. And the first group of shutters and the third group of shutters are correspondingly arranged, so that air can conveniently enter and exit from the cabinet body and the box body to ventilate, dissipate heat and cool the equipment. According to the utility model, no fan needs to be added, the air inlet amount is increased, and heat in the cabinet body is discharged by using the original axial flow fan at the top; and the problem that hot air in the equipment cannot be effectively discharged due to negative pressure formed in a room caused by insufficient air inlet volume due to damp or blockage of the first air port can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of inverters, and more specifically, to an inverter and a centralized inverter. Background Art

[0002] A photovoltaic inverter (PV inverter or solar inverter) is an inverter that can convert the variable DC voltage generated by a photovoltaic (PV) solar panel into AC power with the frequency of the commercial power grid, and it is the main equipment of a photovoltaic power station. Inverters are divided into distributed inverters and centralized inverters.

[0003] Currently, centralized inverters are widely used in large-scale ground-mounted photovoltaic power stations. However, their ventilation and heat dissipation devices basically install axial fans on the top of the equipment to draw out the heat inside the equipment. The internal space of the equipment is small, and the ventilation and heat dissipation effect is poor. During the operation of the inverter, a large amount of heat generated by the equipment cannot be discharged in time, the internal temperature of the equipment is relatively high, the service life of the equipment is reduced, its working efficiency is lowered, and in severe cases, equipment failure and shutdown may occur, or even a fire may be caused by high temperature. Summary of the Invention

[0004] The technical problem to be solved by the utility model is that the ventilation and heat dissipation device of the centralized inverter has a poor heat dissipation effect, and a large amount of heat inside the equipment cannot be discharged in time, resulting in a relatively high internal temperature of the equipment.

[0005] To solve the above technical problem, according to one aspect of the utility model, an inverter is provided.

[0006] The inverter includes a cabinet body, various devices are installed in the cabinet body, first group of louvers and a second group of louvers are respectively provided on two opposite side walls of the cabinet body, and the first group of louvers and the second group of louvers form air convection to facilitate ventilation, heat dissipation and cooling of the devices.

[0007] According to another aspect of the utility model, a centralized inverter is provided. The centralized inverter includes a box body and an inverter group. The box body is used to accommodate the inverter group. The inverter group includes a plurality of the above-mentioned inverters. The inverter groups are respectively arranged on both sides inside the box body so that a wind channel is formed in the box body along the front-rear direction. The second group of louvers of the inverter cabinet faces the wind channel, and the first group of louvers is close to the side wall of the box body.

[0008] Wherein, a third group of louvers is provided on the side wall of the box body, and the first group of louvers and the third group of louvers are correspondingly arranged to facilitate air to enter and exit the cabinet body and the box body for ventilation, heat dissipation and cooling of the devices.

[0009] Furthermore, an axial fan for exhausting air to the top of the box body is provided on the top of the box body.

[0010] Further, air inlets and outlets are respectively provided on the upper parts of the front and rear walls of the box body, and protective covers are installed on the air inlets and outlets.

[0011] Further, a fourth set of louvers and a fifth set of louvers corresponding to the air ducts are respectively provided on the front and rear walls of the box body, and the fourth set of louvers and the fifth set of louvers form air convection along the air ducts.

[0012] Further, dust removal filters are fixedly installed inside the first set of louvers, the second set of louvers, the third set of louvers, the fourth set of louvers and the fifth set of louvers.

[0013] Further, filter cotton is also installed on the first set of louvers and the second set of louvers, and the filter cotton is arranged between the dust removal filter and the louvers.

[0014] Further, the number of louvers in the fourth set of louvers and the fifth set of louvers is two.

[0015] Preferably, the number of louvers in the third set of louvers is one.

[0016] Preferably, the number of inverters in the inverter group is two.

[0017] Compared with the prior art, the technical solutions provided by the embodiments of the present invention have at least the following beneficial effects:

[0018] First, a second set of louvers is provided on the other opposite side wall of the inverter cabinet body, forming air convection with the first set of louvers on the existing side wall, facilitating ventilation, heat dissipation and temperature reduction of the equipment.

[0019] Second, a third set of louvers is provided on the side wall of the box body, and the first set of louvers and the third set of louvers are arranged correspondingly, facilitating air to enter and exit from the cabinet body and the box body to ventilate, dissipate heat and cool down the equipment. There is no need to add a fan to increase the air intake volume. The original axial flow fan at the top is used to discharge the heat in the cabinet body, avoiding the formation of negative pressure in the room due to insufficient air intake caused by moisture or blockage of the first air inlet, and the hot air in the equipment cannot be effectively discharged. The temperature of the inverter equipment in the cabinet body is controlled within a reasonable range, increasing the service life of the equipment and reducing other secondary hazards.

[0020] Third, the technical solutions provided by the embodiments of the present invention are improvements on the prior art and have low costs. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention.

[0022] Figure 1 Schematic diagram of the internal installation structure of a centralized inverter provided in this embodiment;

[0023] Figure 2 is Figure 1 front view of the shown centralized inverter;

[0024] Figure 3 is Figure 1 side view of the shown centralized inverter;

[0025] Figure 4 is Figure 1 rear view of the shown centralized inverter;

[0026] Figure 5 is Figure 1 schematic diagram of the air flow direction for ventilation and heat dissipation of the shown centralized inverter;

[0027] Figure 6 is schematic diagram of the air flow direction for ventilation and heat dissipation of a centralized inverter in the prior art. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0029] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present utility model belongs. The terms "first", "second" and similar words used in the specification and claims of the patent application of the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one.

[0030] Referring to Figures 1 to 4 , the present utility model provides a centralized inverter, including a box body. The box body is a cube and includes a front wall 11, a right side wall 12, a rear wall 14 and a left side wall 13. The front wall 11, the right side wall 12, the rear wall 14 and the left side wall 13 are fixedly connected in sequence to enclose a rectangular storage space. The front wall 11 is also the front view of the box body, the rear wall 14 is also the rear view of the box body, and the right side wall 12 and the left side wall 13 are the same and are the right side or left side view of the box body.

[0031] Two sets of inverters, Inverter 1 and Inverter 2, are installed in the rectangular storage space. The two sets of inverters are respectively arranged on both sides inside the box body so as to form an air duct in the front - rear direction of the box body. The front - rear direction is defined by the front wall 11 and the rear wall 14 of the box body. Preferably, Inverter 1 and Inverter 2 are arranged diagonally with respect to the rectangle surrounded by the four - side doors of the box body.

[0032] Each set of the inverters includes a cabinet body. Various devices are installed in the cabinet body. Specifically, a sampling circuit, a protection circuit, a transformer assembly, an inverter, a capacitor assembly, and a drive circuit that cooperate with each other are respectively and fixedly installed in the inverter cabinet body. The drive circuit controls the output of the oscillation signal of the inverter circuit. The signal is amplified and pushes the field - effect transistor to continuously switch, so that after the direct current is transmitted, a certain alternating - current effect can be formed. After correction, the direct current can be inverted into alternating current, and other auxiliary circuits are used to compensate and correct the input direct current and protect the voltage.

[0033] On the two opposite side walls 21 and 22 of the cabinet body of Inverter 1, a first set of louvers and a second set of louvers are respectively provided. The first set of louvers and the second set of louvers form air convection, which is convenient for ventilating, dissipating heat, and cooling the devices.

[0034] The second set of louvers faces the air duct. The first set of louvers is adjacent to the right - hand side wall 12 of the box body. A third set of louvers is provided on the right - hand side wall 12 of the box body. The first set of louvers and the third set of louvers are correspondingly arranged, which is convenient for air to enter and exit from the cabinet body and the box body to ventilate, dissipate heat, and cool the devices.

[0035] Inverter 2 is exactly the same as Inverter 1, and ventilation louvers are correspondingly provided on the left - hand side wall 13 of the cabinet body.

[0036] An axial - flow fan is installed on the top of the box body. Air inlets and outlets are respectively provided on the upper parts of the front wall 11 and the rear wall 12 of the box body, and protective covers are installed on the air inlets and outlets. The axial - flow fan takes out the heat generated during the operation of the inverter. Its specific structure is the same as that of the prior art.

[0037] A fourth set of louvers and a fifth set of louvers are respectively provided on the front wall 11 and the rear wall 14 of the box body. The fourth set of louvers and the fifth set of louvers form a main air duct in the front - rear direction. Among them, both the fourth set of louvers and the fifth set of louvers include 2 louvers.

[0038] The fourth set of louvers, the first set of louvers, the second set of louvers, and the third set of louvers form a new ventilation and heat - dissipation branch, which further facilitates the ventilation and heat - dissipation of Inverter 1. The specific wind direction is as Figure 5As shown by the arrow: The cold air from the outside enters the front wall 11 of the box body through the fourth group of louvers, then enters the left side wall 21 of the inverter 1 through the first group of louvers, fully contacts the internal equipment of the inverter 1 to take away the heat therein, then is discharged from the right side wall 22 of the inverter 1 through the second group of louvers, and finally is discharged from the right side wall 12 of the box body through the third group of louvers.

[0039] Dust removal filters are fixedly installed inside the first group of louvers, the second group of louvers, the third group of louvers, the fourth group of louvers and the fifth group of louvers. Through the dust removal filters, impurities and dust can be blocked from entering the air flow, reducing the impact on the inverter. The dust removal filters are fixed by metal mesh sheets, preferably in a detachable manner, which is convenient for later maintenance and replacement.

[0040] Among them, filter cotton is also installed on the first group of louvers and the second group of louvers. The filter cotton is arranged between the dust removal filter and the louvers, increasing the protection of the inverter.

[0041] The number of louvers of the first group of louvers, the second group of louvers, the third group of louvers, the fourth group of louvers and the fifth group of louvers can be selected according to the actual ventilation effect. In this embodiment, the number of the fourth group of louvers and the fifth group of louvers is two, and the number of the third group of louvers is one.

[0042] This embodiment is an improvement on the existing technology. The existing technology does not have the second group of louvers and the third group of louvers. The specific air flow direction of ventilation and heat dissipation is as Figure 6 shown.

[0043] In this embodiment, only new louver ventilation openings need to be added on the right side wall 22 of the inverter 1, the right side wall 12 of the box body, the left side wall of the inverter 2 and the left side wall 13 of the box body. Install dust removal filters and filter cotton on the newly added ventilation openings to complete the rectification, establish multiple new ventilation and heat dissipation branches, form convection between the left side wall 21 and the right side wall 22 of the inverter 1, form convection between the right side wall and the left side wall of the inverter 2, increase the air intake, without adding fans, and use the original axial flow fan at the top to control the temperature in the cabinet within a reasonable range, avoiding the formation of negative pressure in the room due to moisture or blockage of the air intake at the top air outlet of the box body, and the hot air in the equipment cannot be effectively discharged.

[0044] The above is only an exemplary implementation manner of the present invention, and is not used to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. An inverter, comprising a cabinet, in which various devices are installed, characterized in that: A first group of shutters and a second group of shutters are respectively provided on two opposite side walls of the cabinet, and the first group of shutters and the second group of shutters form air convection to facilitate ventilation, heat dissipation and cooling of the equipment, wherein dust filters are fixedly installed inside the first group of shutters and the second group of shutters.

2. A centralized inverter, characterized in that: The invention comprises a box and an inverter group, wherein the box is used to accommodate the inverter group, the inverter group comprises a plurality of inverters according to claim 1, the inverter groups are respectively arranged on both sides of the box so that the box forms an air duct along the front-back direction, the second group of shutters of the inverter cabinet faces the air duct, and the first group of shutters is adjacent to the side wall of the box. Among them, a third group of shutters is arranged on the side wall of the box body, and the first group of shutters is arranged corresponding to the third group of shutters, so as to facilitate the air to enter and exit from the cabinet and the box body to ventilate, dissipate heat and cool the equipment.

3. The centralized inverter according to claim 2, characterized in that: An axial flow fan for exhausting air toward the top of the box body is arranged on the top of the box body.

4. The centralized inverter according to claim 3, characterized in that: The upper parts of the front and rear walls of the box body are respectively provided with air inlets and outlets, and protective covers are installed on the air inlets and outlets.

5. The centralized inverter according to claim 4, characterized in that: The front and rear walls of the box body are respectively provided with a fourth group of shutters and a fifth group of shutters corresponding to the air duct, and the fourth group of shutters and the fifth group of shutters form air convection along the air duct.

6. The centralized inverter according to claim 5, characterized in that: The third group of shutters, the fourth group of shutters and the fifth group of shutters are all fixedly installed with dust removal filters inside.

7. The centralized inverter according to claim 6, characterized in that: The first group of shutters and the second group of shutters are also equipped with filter cotton, and the filter cotton is arranged between the dust removal filter and the shutters.

8. The centralized inverter according to claim 7, characterized in that: The number of shutters in the fourth group of shutters and the fifth group of shutters is two.

9. The centralized inverter according to claim 7, characterized in that: The number of the shutters in the third group of shutters is one.

10. The centralized inverter according to claim 7, characterized in that: The inverter group includes two inverters.

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