A type of power distribution cabinet

Abstract

This invention provides a power distribution cabinet with temperature sensors installed both inside and outside. The cabinet includes a heat dissipation mechanism comprising a three-way ball valve, a negative pressure fan, ventilation ducts, and a signal processing device. The three-way ball valve is connected to two ventilation ducts and the negative pressure fan, with one ventilation duct passing through the cabinet and connecting to the outside. The signal processing device is connected to the three-way ball valve, the negative pressure fan, and the temperature sensors. This invention, through the connection of the signal processing device and the temperature sensors, can acquire the temperature and temperature difference between the inside and outside of the power distribution cabinet. The signal processing device is also connected to the three-way ball valve and the negative pressure fan, controlling the fan speed based on the temperature difference and adjusting the connection between the negative pressure fan and the ventilation ducts to achieve three-level heat dissipation mode switching, thereby improving the heat dissipation effect of the power distribution cabinet.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a power distribution cabinet. Background Technology

[0002] As the core equipment for energy storage and distribution, the power distribution cabinet is in a high-load operation state for a long time. The internal power electronic components are prone to temperature rise due to continuous heat generation. Traditional heat dissipation solutions mostly use fixed ventilation or air conditioning. Fixed external circulation fans are prone to drawing hot external air into the power distribution cabinet in high-temperature environments, which aggravates the internal temperature rise. Pure internal circulation heat dissipation is not efficient enough to meet the heat dissipation requirements of high power. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to improve the heat dissipation effect of the power distribution cabinet.

[0004] This utility model solves the above-mentioned technical problems through the following technical means:

[0005] This utility model provides a power distribution cabinet with temperature sensors installed both inside and outside the cabinet. The power distribution cabinet has a heat dissipation mechanism, which includes a three-way ball valve, a negative pressure fan, a ventilation duct, and a signal processing device. The three-way ball valve is connected to two ventilation ducts and the negative pressure fan respectively. One of the ventilation ducts passes through the power distribution cabinet and connects to the outside. The signal processing device is connected to the three-way ball valve, the negative pressure fan, and the temperature sensors.

[0006] Beneficial effects: This utility model connects a signal processing device to a temperature sensor, which can acquire the temperature and temperature difference inside and outside the distribution cabinet. The signal processing device is also connected to a three-way ball valve and a negative pressure fan. It controls the wind speed of the negative pressure fan according to the temperature difference and adjusts the connection between the negative pressure fan and the ventilation pipe to achieve three-level heat dissipation mode switching, thereby improving the heat dissipation effect of the distribution cabinet.

[0007] Preferably, the three-way ball valve has a ball core inside, which is connected to the first gear through a rotating rod, and the first gear is connected to the signal processing device.

[0008] Beneficial effects: This utility model controls the rotation of the first gear by connecting the signal processing device with the first gear, thereby realizing the connection between the negative pressure fan and the ventilation pipe.

[0009] Preferably, the signal processing device includes a microcontroller, the first gear meshes with the second gear, the second gear is connected to a motor via a rotating rod, and the motor is connected to the microcontroller.

[0010] Beneficial effects: This utility model controls the motor through a microcontroller, and the motor controls the rotation of the first gear through the second gear, thereby realizing the connection between the negative pressure fan and the ventilation pipe.

[0011] Preferably, the negative pressure fan is equipped with a fan cover, one end of which is connected to the air outlet of the negative pressure fan, and the other end is connected to a three-way ball valve.

[0012] Beneficial effects: By setting a shroud at the air outlet of the negative pressure fan, the air blown out by the negative pressure fan cannot be dispersed but is concentrated in the shroud, thereby improving the ventilation efficiency and heat dissipation effect of the negative pressure fan.

[0013] Preferably, the fan cover is equipped with a semiconductor cooling chip.

[0014] Beneficial effects: This utility model can further reduce the temperature inside the power distribution cabinet by setting a semiconductor cooling chip in the fan cover.

[0015] Preferably, the bottom of the distribution cabinet is equipped with louvers on both sides.

[0016] Beneficial effects: This utility model increases the ventilation effect of the power distribution cabinet by using louvers.

[0017] Preferably, the distribution cabinet is equipped with a fire extinguishing mechanism, which includes a pressure storage container and a fire detection tube. The pressure storage container and the fire detection tube are connected by a container valve. The fire detection tube can pass through the distribution cabinet and is installed inside it. The container valve is controlled to open by a pressure gauge.

[0018] Beneficial effects: This utility model extinguishes fires in electrical distribution cabinets through a fire extinguishing mechanism. When the electrical distribution cabinet catches fire, the fire detection tube softens and bursts at the point of most intense heating to form a spray nozzle, causing a sudden drop in internal pressure. This triggers the container valve to open via a pressure gauge, allowing the substances in the pressure storage container to be released through the fire detection tube under internal pressure, thus extinguishing the fire in the electrical distribution cabinet.

[0019] Preferably, the fire detection tube is fixed to the inside of the distribution cabinet on both sides and the top by clips.

[0020] Beneficial effects: This utility model enables the fire to be extinguished by fixing the fire detection tube inside the distribution cabinet.

[0021] Preferably, the distance between the fire detection tube and the electrical components in the distribution cabinet is 30-100mm.

[0022] Beneficial effect: The distance between the fire detection tube of this utility model and the electrical components in the distribution cabinet should not exceed 100mm; otherwise, when the electrical components catch fire, the nozzle of the fire detection tube will not be able to extinguish the fire from a distance.

[0023] Preferably, the extinguishing agent is stored inside the pressurized container.

[0024] The advantages of this utility model are:

[0025] The power distribution cabinet of this utility model has a temperature sensor for temperature monitoring, a heat dissipation mechanism for ventilation and heat dissipation, and a fire extinguishing mechanism for automatic fire extinguishing. These three mechanisms work together to ensure the safe and stable operation of the power distribution cabinet. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the power distribution cabinet in Embodiment 1 of this utility model;

[0027] Figure 2 This is a schematic diagram of the heat dissipation mechanism in Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the fire extinguishing mechanism in Embodiment 1 of this utility model. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] according to Figure 1-3As shown, this embodiment provides a power distribution cabinet, which is equipped with a heat dissipation mechanism 10. The heat dissipation mechanism 10 includes a three-way ball valve 11, a negative pressure fan 12, a first ventilation pipe 13, a second ventilation pipe 14, and a signal processing device 15. The three-way ball valve 11 is connected to the negative pressure fan 12, the first ventilation pipe 13, and the second ventilation pipe 14 respectively. The negative pressure fan 12, the first ventilation pipe 13, and the second ventilation pipe 14 are fixed to the top of the power distribution cabinet by a fixing rod 16. The negative pressure fan 12 can circulate the air inside the power distribution cabinet by drawing it out. The negative pressure fan 12 has a frequency conversion control module, which can control the operating speed of the negative pressure fan 12 through the signal processing device 15. The first ventilation pipe 13 and the second ventilation pipe 14 are connected by threads. The first ventilation pipe 13 passes through the distribution cabinet and is connected to the outside. The second ventilation pipe 14 is inside the distribution cabinet and can reduce the internal temperature of the distribution cabinet by blowing air through the negative pressure fan 12. The air outlet of the negative pressure fan 12 is provided with a fan cover 121. The negative pressure fan 12 is connected to the three-way ball valve 11 through the fan cover 121. One end of the fan cover 121 with a large diameter is connected to the negative pressure fan 12, and the other end with a small diameter is connected to the three-way ball valve 11 by threads. The inner surface of the fan cover 121 is provided with a semiconductor cooling chip (not shown in the figure), and the semiconductor cooling chip is electrically connected.

[0032] The bottom of the power distribution cabinet is provided with louvers 20 on both sides. The louvers 20 are made of high temperature resistant composite material and have impact resistance and rainproof function. The louvers 20 can automatically close under natural gravity and can automatically open under negative pressure without the need for an additional driving device.

[0033] The signal processing device 15 is located outside the power distribution cabinet. The signal processing device 15 includes an analog-to-digital converter (not shown) and a microcontroller (not shown). Temperature sensors are installed both inside and outside the power distribution cabinet. The temperature sensor installed outside the cabinet is a first sensor 151, and the temperature sensor installed inside the cabinet is a second sensor 152. The first sensor 151 and the second sensor 152 are connected to the signal processing device 15 via an electrical connection. The first temperature sensor 151 detects the temperature outside the power distribution cabinet, and the second temperature sensor 152 detects the temperature inside the power distribution cabinet. The first temperature sensor 151 and the second temperature sensor 152 send temperature signals to the signal processing device 15, which converts the temperature signals into electrical signals using the analog-to-digital converter.

[0034] The three-way ball valve 11 includes a ball core 111, which is disposed inside the valve. The ball core 111 has three interconnected holes (not shown in the figure), two of which are aligned in a straight line, and the third hole is perpendicular to this line. The ball core 111 is connected to a first gear 112 via a rotating rod. The first gear 112 meshes with a second gear 114, which is connected to a motor 113. The motor 113 is electrically connected to a microcontroller. The microcontroller drives the motor 113 to rotate the second gear 114 based on an electrical signal. The second gear 114 then drives the first gear 112 to rotate, thereby rotating the ball core 111. This changes the connection between the negative pressure fan 12 connected to the three-way ball valve 11 and the first ventilation duct 13 and the second ventilation duct 14, achieving a three-level cooling mode switching, as detailed below:

[0035] External circulation mode: When the temperature difference between the external temperature and the internal temperature of the distribution cabinet is less than 0℃, the microcontroller of the signal processing device 15 controls the motor 113 to start, and the ball core 111 rotates so that the fan cover 121 is only connected to the first ventilation pipe 13. The negative pressure fan 12 is started by the signal processing device 15 to run at low speed. At this time, the air inside the distribution cabinet is discharged through the negative pressure fan 12, and the inside of the distribution cabinet is in a negative pressure state. The blades of the louver 20 are pushed open by the external airflow to open the channel, allowing the outside air to enter the inside of the distribution cabinet, so that the air inside the distribution cabinet is externally circulated.

[0036] Internal circulation + auxiliary cooling mode: When the temperature difference between the external temperature and the internal temperature of the power distribution cabinet is higher than 15℃, the microcontroller of the signal processing device 15 controls the motor 113 to start, and the ball core 111 rotates so that the fan cover 121 is only connected to the second ventilation pipe 14. The negative pressure fan 12 is started to run at full speed through the signal processing device 15, and at the same time the semiconductor cooling chip on the inner surface of the fan cover 121 is activated to reduce the temperature inside the power distribution cabinet.

[0037] Hybrid circulation mode: When the temperature difference between the external and internal temperatures of the distribution cabinet is between 0 and 15°C, the microcontroller of the signal processing device 15 controls the motor 113 to start, and the ball core 111 rotates, causing the fan shroud 121 to connect with the first ventilation pipe 13 and the second ventilation pipe 14 respectively. The negative pressure fan 12 is then started running at medium speed, achieving 50% external circulation and 50% internal circulation of air inside the distribution cabinet. Simultaneously, the semiconductor cooling chip on the inner surface of the fan shroud 121 is activated to lower the internal temperature of the distribution cabinet.

[0038] The distribution cabinet is equipped with a fire extinguishing mechanism 30, which includes a pressure storage container 31 and a fire detection tube 32. The pressure storage container 31 stores fire extinguishing agent and is located on the side outside the distribution cabinet. It is connected to the fire detection tube 32 through a container valve 33. The fire detection tube 32 can pass through the distribution cabinet and is installed inside it. It is fixed to the inside of the distribution cabinet on both sides and the top by a buckle 35. The fire detection tube 32 at the top of the distribution cabinet is also fixed by a mounting plate 36. Specifically, the buckle 35 is used to fix the fire detection tube to the mounting plate 36. The mounting plate 36 is a multi-hole mounting plate, which allows the fire detection tube 32 to be installed on top of electrical components inside the distribution cabinet. The mounting plate 36 does not affect the air circulation inside the distribution cabinet. The distance between the fire detection tube 32 and the electrical components in the distribution cabinet cannot exceed 1m. The container valve 33 is controlled to open by a pressure gauge 34. The fire detection tube 32 is made of non-metallic synthetic material and has the characteristics of pressure resistance, leakage resistance, flexibility and temperature sensing. The fire detection tube 32 softens and bursts at the point where it is heated most intensely to form a spray nozzle with an aperture of 3-5mm. This causes a sudden drop in pressure inside the fire detection tube 32. The pressure gauge 34 triggers the container valve 33 to open, so that the extinguishing agent in the pressure storage container 31 is released through the spray nozzle under the internal pressure to extinguish the fire source.

[0039] The working principle of the power distribution cabinet in this embodiment is as follows:

[0040] During the operation of the power distribution cabinet, temperature monitoring by temperature sensors, ventilation and heat dissipation by heat dissipation mechanism 10, and automatic fire extinguishing by fire extinguishing mechanism 30 work together to ensure the safe and stable operation of the power distribution cabinet. The first temperature sensor 151 and the second temperature sensor 152 detect the external and internal temperatures of the power distribution cabinet in real time, respectively, and send the temperature signals to the signal processing device 15. The analog-to-digital converter of the signal processing device 15 converts the temperature signals into electrical signals. The microcontroller of the signal processing device 15 realizes intelligent switching of three-level heat dissipation modes based on the electrical signals. When the electrical components inside the power distribution cabinet catch fire, the fire detection tube 32 softens and bursts at the point of most intense heating to form a spray nozzle with an aperture of 3-5mm, which sprays directly at the fire source to extinguish the fire.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electrical distribution cabinet, characterized in that, Temperature sensors are installed both inside and outside the power distribution cabinet. A heat dissipation mechanism (10) is installed inside the power distribution cabinet. The heat dissipation mechanism (10) includes a three-way ball valve (11), a negative pressure fan (12), a ventilation pipe, and a signal processing device (15). The three-way ball valve (11) is connected to two ventilation pipes and the negative pressure fan (12) respectively. One of the ventilation pipes passes through the power distribution cabinet and connects to the outside. The signal processing device (15) is connected to the three-way ball valve (11), the negative pressure fan (12), and the temperature sensor.

2. The power distribution cabinet of claim 1, wherein, The three-way ball valve (11) has a ball core (111) inside. The ball core (111) is connected to the first gear (112) through a rotating rod. The first gear (112) is connected to the signal processing device (15).

3. The power distribution cabinet of claim 2, wherein, The signal processing device (15) includes a microcontroller, the first gear (112) meshes with the second gear (114), the second gear (114) is connected to the motor (113) via a rotating rod, and the motor (113) is connected to the microcontroller.

4. The power distribution cabinet of claim 1, wherein, The negative pressure fan (12) is equipped with a hood (121). One end of the hood (121) is connected to the air outlet of the negative pressure fan (12), and the other end is connected to a three-way ball valve (11).

5. The power distribution cabinet of claim 4, wherein, The inner surface of the shroud (121) is provided with a semiconductor cooling chip.

6. The power distribution cabinet of claim 1, wherein, The bottom of the distribution cabinet is equipped with louvers (20) on both sides.

7. The power distribution cabinet of claim 1, wherein, The distribution cabinet is equipped with a fire extinguishing mechanism (30), which includes a pressure storage container (31) and a fire detection tube (32). The pressure storage container (31) and the fire detection tube (32) are connected through a container valve (33). The fire detection tube (32) can pass through the distribution cabinet and is installed inside it. The container valve (33) is controlled to open by a pressure gauge (34).

8. The switchgear of claim 7, wherein, The fire detection tube (32) is fixed to the inside of the distribution cabinet on both sides and the top by a buckle (35).

9. The power distribution cabinet of claim 7, wherein, The distance between the fire detection tube (32) and the electrical components in the distribution cabinet is 30-100mm.

10. The power distribution cabinet of claim 7, wherein, The pressure vessel (31) stores the extinguishing agent inside.

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