Ventilation and heat dissipation structure of capacitor chamber

Abstract

The utility model relates to electric power facilities, and particularly discloses a ventilation and heat dissipation structure of a capacitor chamber, which comprises the capacitor chamber, a capacitor cabinet is fixedly arranged in the capacitor chamber, and an air inlet fan is fixedly arranged on the inner wall of the capacitor chamber. The input end of the air inlet fan is fixedly provided with an air pipe reducer communicated with an air inlet formed in the capacitor chamber, and the port of an air pipe fixedly arranged at the output end of the air inlet fan is over against a cable trench formed below the capacitor cabinet; a capacitor and a series reactor are movably installed in the capacitor cabinet, a cabinet top air outlet is formed in the side, opposite to the cable trench, of the capacitor cabinet, and the cabinet top air outlet is communicated with the input end of an exhaust fan fixedly installed on the capacitor chamber. According to the utility model, the heat dissipation system of the capacitor body is organically combined with the ventilation of the capacitor chamber, so that the heat dissipation effect is greatly improved, the energy consumption is reduced, and the reliable operation and the energy-saving property of the capacitor are improved.

Description

Technical Field

[0001] The utility model relates to electric power facilities, in particular to a ventilation and heat dissipation structure of a capacitor room. Background Art

[0002] Power capacitors have been widely used in reactive power compensation and improving the power factor of the power grid. A more common form integrates capacitors and series reactors into a cabinet. However, this capacitor cabinet (usually with combustible oil) will be installed separately in the capacitor room for fire safety reasons. Capacitors and series reactors will generate a lot of heat during operation. Existing capacitor cabinets have holes in the lower part of the cabinet side for air intake, and exhaust fans are installed on the top or upper part of the cabinet side. The heat in the cabinet is dissipated into the capacitor room. To prevent the ambient temperature in the capacitor room from being too high, HVAC professionals have to design a set of mechanical ventilation devices to discharge indoor heat to the outside. However, the capacitor space is small and the air inlet and outlet air paths are easily short-circuited. Even if the ventilation volume is increased, the heat dissipation effect is difficult to achieve satisfactory results or energy consumption increases, which seriously affects the safe and stable operation of the capacitor. In some projects, in order to meet the indoor temperature requirements of the capacitor, air conditioning and refrigeration have to be added to meet the needs of continuous and stable operation of the capacitor, which greatly increases energy consumption. Utility Model Content

[0003] The utility model aims to provide a ventilation and heat dissipation structure for a capacitor chamber, aiming to solve the problems of poor heat dissipation effect or excessive energy consumption of the capacitor chamber in the prior art.

[0004] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0005] A ventilation and heat dissipation structure for a capacitor room, comprising a capacitor room, a capacitor cabinet fixedly installed therein, an air inlet fan fixedly installed on the inner wall of the capacitor room, an air duct reducer and reducer connected to an air inlet opened on the capacitor room fixedly installed at the input end of the air inlet fan, and an air duct fixedly installed at the output end of the air inlet fan facing a cable trench opened below the capacitor cabinet;

[0006] Capacitors and series reactors are movably installed in the capacitor cabinet. A cabinet top air outlet is opened on the side of the capacitor cabinet opposite to the cable trench. The cabinet top air outlet is connected to the input end of the exhaust fan fixedly installed on the capacitor room.

[0007] Preferably, an air distribution pipe is fixedly connected to the air duct, and the air distribution pipe extends from the air duct in the cable trench and is connected to an air distribution plate installed on the outside of the series reactor.

[0008] Preferably, a rain shelter covering the air inlet is fixedly provided on the side wall of the capacitor chamber.

[0009] Preferably, a rodent-proof net and a dust filter are provided on the port on the side of the rain shield that contacts the air inlet.

[0010] Preferably, the rodent-proof net is a wire mesh.

[0011] Preferably, the dust filter is made of non-woven fabric.

[0012] Preferably, an electric control box is fixedly installed on the inner wall of the capacitor room, and the wires leading out of the electric control box are electrically connected to the air inlet fan, the exhaust fan, the temperature sensor fixedly installed in the air outlet port on the top of the cabinet, the wires leading out of the capacitor cabinet, and the smoke fire detector fixedly installed on the top inside the capacitor room.

[0013] Preferably, the air flow distribution plate is disc-shaped, and the outer edge of the disc is provided with a folded edge protruding toward one side of the series reactor.

[0014] Preferably, the air flow distribution plate is provided with a plurality of air holes arranged in a matrix.

[0015] In the above technical solution, the utility model provides a ventilation and heat dissipation structure for a capacitor room, which has the following beneficial effects: the ventilation and heat dissipation structure for the capacitor room can effectively avoid the problem that the airflow in the conventional capacitor room is prone to short-circuiting, and when the conventional cabinet takes in air from the lower opening on the side of the capacitor cabinet, the incoming airflow flows along the side wall and is easily short-circuited internally, resulting in poor convection heat dissipation effect.

[0016] Furthermore, by introducing the outdoor cold air flow directly into the bottom of the capacitor cabinet, there is no air short circuit phenomenon, and the air distribution pipe is aimed at the heat-generating equipment that needs to be cooled, so that the high-speed air flow directly flushes the surface of the component, achieving the purpose of rapid cooling. The use of the air distribution plate not only allows the cooling air flow to take away heat from the bottom surface, but also flushes the high-speed air flow from multiple side facades, thereby enhancing the cooling effect.

[0017] Secondly, the combination of temperature control of the intake and exhaust fans not only increases the reliability of the ventilation system, but also allows one or two fans to be turned on according to the external ambient temperature, achieving energy-saving ventilation effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of a planar structure provided by an embodiment of the present utility model;

[0020] Figure 2 A schematic diagram of the detailed structure of the air duct part provided in an embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 1. Capacitor room; 2. Rain shelter; 3. Rodent-proof net; 4. Dust filter; 5. Air duct reducer and reducer; 6. Air inlet fan; 7. Electric control box; 8. Air duct; 9. Exhaust fan; 10. Cabinet top air outlet; 11. Temperature sensor; 12. Capacitor cabinet; 13. Capacitor; 14. Series reactor; 15. Air distribution plate; 16. Air distribution pipe; 17. Cable trench; 18. Smoke detector. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-2 As shown, a ventilation and heat dissipation structure of a capacitor chamber includes a capacitor chamber 1, combined with Figure 1 It can be seen that a rain shield 2 covering the air inlet is fixedly installed on the side wall of the capacitor room 1, and a rodent-proof net 3 and a dust filter 4 are provided on the port on the side of the rain shield 2 in contact with the air inlet to prevent dust, small animals, rain, etc. from being sucked into the air duct 8.

[0025] The means for solving the above-mentioned problem of poor heat dissipation or excessive energy consumption of the capacitor chamber 1 include:

[0026] Example 1

[0027] A capacitor cabinet 12 is fixedly installed in the capacitor room 1. An air intake fan 6 is fixedly installed on the inner wall of the capacitor room 1. The input end of the air intake fan 6 is fixedly installed with an air duct reducer 5 connected to the air inlet opened on the capacitor room 1 (increasing the area of ​​the dust filter 4 and reducing the suction resistance). The port of the air duct 8 fixedly installed at the output end of the air intake fan 6 is directly opposite the cable trench 17 opened below the capacitor cabinet 12. A capacitor 13 and a series inductor 14 are movably installed in the capacitor cabinet 12. A cabinet top air outlet 10 is opened on the side of the capacitor cabinet 12 opposite to the cable trench 17. The cabinet top air outlet 10 is connected to the input end of the exhaust fan 9 fixedly installed on the capacitor room 1. This can effectively avoid the problem of short circuit easily occurring in the airflow of the conventional capacitor room 1, the problem that the conventional cabinet body takes in air from the lower side opening of the capacitor cabinet 12, the incoming airflow is easily short-circuited internally, and the convection heat dissipation effect is poor.

[0028] Example 2

[0029] An air distribution pipe 16 is fixedly connected to the air duct 8 . The air distribution pipe 16 extends into the cable trench 17 and is connected to an air distribution plate 15 installed outside the series reactor 14 .

[0030] The airflow distribution plate 15 is disc-shaped, and its outer edge is provided with a folded edge that protrudes toward the side of the series reactor 14. The folded edge fits over the heat sink on the series reactor 14 with an appropriate gap. The corner between the folded edge and the bottom plate is streamlined to reduce airflow resistance and increase the airflow velocity in the components.

[0031] The air flow distribution plate 15 is provided with a plurality of air holes arranged in a matrix, and the plurality of air holes are used to increase the inflow of air flow.

[0032] Furthermore, the distance between the air distribution pipe 16 and the capacitor 13 and the amount of heat dissipation need to be reasonably coordinated, and the air flow should have a reasonable flow velocity distribution.

[0033] By directly introducing the outdoor cold air flow into the lower part of the capacitor cabinet 12, there is no air short-circuiting phenomenon, and the air distribution pipe 16 is aligned with the heat-generating equipment that needs to be cooled, so that the high-speed air flow directly flushes the surface of the component, thereby achieving the purpose of rapid cooling. The use of the air distribution plate 15 not only allows the cooling air flow to remove heat from the bottom surface, but also flushes the high-speed air flow from multiple side surfaces, thereby enhancing the cooling effect.

[0034] It should be noted that in the above embodiment, an electric control box 7 is fixedly installed on the inner wall of the capacitor room 1, and the wires leading out of the electric control box 7 are electrically connected to the air inlet fan 6, the exhaust fan 9, the temperature sensor 11 fixedly installed in the port of the cabinet top air outlet 10, the wires leading out of the capacitor cabinet 12, and the smoke fire detector 18 fixedly installed on the top inside the capacitor room 1.

[0035] Working Principle: When the capacitor cabinet 12 is switched on, the electrical control box 7 receives the operating signal from the capacitor cabinet 12 and activates the intake fan 6. Fresh outdoor air flows from outside through the rain shield 2, rodent screen 3, and dust filter 4, and is drawn into the air duct 8. The air is then distributed to the heat-generating equipment, namely the capacitor 13 and series reactor 14, via the air distribution pipe 16 and air distribution plate 15 at the end of the air duct 8. The amount of air distributed is determined by the heat dissipation density of the equipment, which in turn determines the size and number of air distribution pipes 16. Simultaneously, a temperature sensor 11 installed at the cabinet top air outlet 10 detects the temperature of the air after heat exchange. When the temperature sensor 11 determines that the temperature has risen to the set value, the exhaust fan 9 is turned on, increasing the ventilation rate and thus reducing the temperature inside the cabinet. When the outdoor temperature drops, the temperature sensor 11 determines that the temperature has dropped to the set value and shuts off the exhaust fan 9, achieving energy-saving and consumption-reducing control effects. Furthermore, if a failure of the intake fan 6 is detected, the exhaust fan 9 is also turned on, serving as a backup and improving the continuous reliability of ventilation. When the smoke detector 18 detects a fire, it will shut down the ventilation system and send a fire alarm to the factory fire alarm panel. When the capacitor cabinet 12 stops operating, the operation signal is disconnected, and the electric control box 7 receives the signal and delays the shutdown of the air inlet fan 6 and the exhaust fan 9.

[0036] The electric control box 7 can be linked with the dehumidifier in the capacitor room 1, that is, when the capacitor cabinet 12 stops operating and the ventilation system is shut down, the dehumidifier is turned on to avoid moisture accidents caused by long-term shutdown of components in the capacitor cabinet 12.

[0037] It should be noted that the above-mentioned electronic components and control programs are all common technical knowledge of those skilled in the art, and therefore will not be described in detail.

[0038] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A ventilation and heat dissipation structure for a capacitor room, characterized in that: The invention comprises a capacitor room (1), in which a capacitor cabinet (12) is fixedly installed, an air inlet fan (6) is fixedly installed on the inner wall of the capacitor room (1), an air duct reducer (5) connected to an air inlet provided on the capacitor room (1) is fixedly installed at the input end of the air inlet fan (6), and a port of an air duct (8) fixedly installed at the output end of the air inlet fan (6) faces a cable trench (17) provided below the capacitor cabinet (12); A capacitor (13) and a series reactor (14) are movably installed in the capacitor cabinet (12). A cabinet top air outlet (10) is provided on a side of the capacitor cabinet (12) opposite to the cable trench (17). The cabinet top air outlet (10) is connected to an input end of an exhaust fan (9) fixedly installed on the capacitor chamber (1).

2. The ventilation and heat dissipation structure of a capacitor chamber according to claim 1, characterized in that: An air distribution pipe (16) is fixedly connected to the air duct (8), and the air distribution pipe (16) extends from the air duct (8) in the cable trench (17) and is connected to an air distribution plate (15) installed outside the series reactor (14).

3. The ventilation and heat dissipation structure of a capacitor chamber according to claim 1, characterized in that: A rain shelter (2) covering the air inlet is fixedly provided on the side wall of the capacitor chamber (1).

4. The ventilation and heat dissipation structure of a capacitor chamber according to claim 3, characterized in that: A rodent-proof net (3) and a sand and dust filter (4) are provided on the port on the side of the rain shield (2) that contacts the air inlet.

5. The ventilation and heat dissipation structure of a capacitor chamber according to claim 4, characterized in that: The rat-proof net (3) is a wire mesh.

6. The ventilation and heat dissipation structure of a capacitor chamber according to claim 4, characterized in that: The sand and dust filter (4) is made of non-woven fabric.

7. The ventilation and heat dissipation structure of a capacitor chamber according to claim 1, characterized in that: An electric control box (7) is fixedly mounted on the inner wall of the capacitor room (1), and the wires led out of the electric control box (7) are electrically connected to the air inlet fan (6), the exhaust fan (9), a temperature sensor (11) fixedly mounted in the port of the cabinet top air outlet (10), the wires led out of the capacitor cabinet (12), and a smoke fire detector (18) fixedly mounted on the top inner side of the capacitor room (1).

8. The ventilation and heat dissipation structure of a capacitor chamber according to claim 2, characterized in that: The air flow distribution plate (15) is in the shape of a plate, and the outer edge of the plate is provided with a folded edge that is raised toward one side of the series reactor (14).

9. The ventilation and heat dissipation structure of a capacitor chamber according to claim 2, characterized in that: The air flow distribution plate (15) is provided with a plurality of air holes arranged in a matrix.

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