Filtering heat dissipation device of direct current charging cabinet

Abstract

The utility model provides a filtering heat dissipation device of a direct current charging cabinet, which comprises a high-frequency switching power supply module arranged in the direct current charging cabinet body, and a fan air inlet and a fan air outlet are arranged at two ends of the high-frequency switching power supply module. The fan air inlet and the fan air outlet are respectively fixed on cabinet doors at the front part and the rear part of the direct-current charging cabinet body and are used for dissipating heat of a heating source in the cabinet body; the air outlets and the air inlets are provided with filtering heat dissipation devices, a plurality of fans are fixedly arranged in mounting frames in the filtering heat dissipation devices, clamping grooves are fixedly formed in the outer sides of the mounting frames, sliding filter screen fixing frames are arranged in the clamping grooves, one sides of the clamping grooves are open, and locking mechanisms are arranged at the two ends of the clamping grooves and used for fixing the filter screen fixing frames. The heat dissipation performance and the dustproof capability of the DC charging cabinet are improved, the maintenance difficulty and the maintenance cost are greatly reduced, and the DC charging cabinet has important value for improving the reliability and the economical efficiency of DC power supply systems of power plants and transformer substations.

Description

Technical Field

[0001] The utility model relates to the field of DC charging cabinets, and particularly relates to a filtering and heat dissipation device for a DC charging cabinet. Background Technique

[0002] DC power supply systems play an important role in power plants and substations. The working power supplies of relay protection devices and automatic devices, as well as the operating power supplies of switch disconnectors, etc., are all powered by DC power supply systems. DC charging cabinets are one of the key devices in DC power supply systems. Under normal circumstances, they operate with DC loads and float charge the storage batteries at the same time. The DC load current in power plants is relatively large, and DC charging cabinets need to output a large current. Multiple high-frequency switching power supply modules are equipped. The rated current of a single high-frequency switching power supply module has reached 40A. The greater the output current of the high-frequency switching power supply module, the greater its heat generation. At present, mainly through the fans inside the high-frequency switching power supply module, external cold air is sucked in through the front door metal grid of the DC charging cabinet, and hot air is discharged through the rear door metal grid to achieve the purpose of cooling the high-frequency switching power supply module and the DC charging cabinet. The fans of the high-frequency switching power supply module are always in operation. Temperature control devices are usually installed in DC charging cabinets with relatively large power. When the temperature inside the cabinet reaches a certain value, the top fans of the cabinet are automatically started to discharge the heat inside the cabinet.

[0003] At present, no dust-proof filtering measures are installed on the front and rear door metal grids of DC charging cabinets. When the cold air outside the cabinet enters the cabinet through the front door metal grid, dust in the air is brought into the cabinet, resulting in more dust inside the DC charging cabinet and the high-frequency switching power supply module, posing a potential safety hazard to the safe operation of the DC charging cabinet. At the same time, it is necessary to cut off power regularly for dust cleaning, and the maintenance workload is large. When the top fans of the cabinet are started to suck in cold air from outside the cabinet, dust in the air is also brought into the cabinet, making the inside of the DC charging cabinet very dirty, further increasing the maintenance workload and consuming manpower, financial resources, etc. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a filtering and heat dissipation device for a DC charging cabinet to solve the problems in the above background technique.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: it includes high-frequency switching power supply modules installed inside the DC charging cabinet body. Both ends of the high-frequency switching power supply module are provided with a fan air inlet and a fan air outlet. The fan air inlet and the fan air outlet are respectively fixed on the cabinet doors at the front and rear of the DC charging cabinet body for dissipating heat from the heat sources inside the cabinet.

[0006] The top of the DC charging cabinet body is provided with a top heat dissipation frame communicated with it. Both ends of the top heat dissipation frame are provided with a cabinet body fan air inlet and a cabinet body fan air outlet for dissipating heat at the top of the cabinet body.

[0007] A filtering and heat dissipation device is installed on each air outlet and air inlet. A plurality of fans are fixedly arranged in the installation frame of the filtering and heat dissipation device. A clamping groove is fixedly arranged on the outer side of the installation frame. A sliding filter screen fixing frame is arranged in the clamping groove. One side of the clamping groove is open, and locking mechanisms are arranged at both ends of the clamping groove for fixing the filter screen fixing frame.

[0008] Preferably, the blowing surface of the fan at the air outlet faces outward, and the air suction surface of the fan at the air inlet faces outward.

[0009] Preferably, a flange is fixedly arranged in the middle of the installation frame, and the flange is fixed on each air outlet and air inlet through bolts.

[0010] Preferably, cross-shaped stoppers are fixedly arranged on both sides of the filter screen fixing frame, and a filter screen is arranged in the filter screen fixing frame.

[0011] Preferably, a handle is fixedly arranged on the outer side of one end of the filter screen fixing frame.

[0012] Preferably, the fixing cylinder in the locking mechanism is fixed on the clamping groove. A sliding pin shaft is arranged in the fixing cylinder. A spring is arranged between the pin shaft and the fixing cylinder. One end of the spring abuts against the inside of the fixing cylinder, and the other end abuts against the pin shaft.

[0013] The end part of the pin shaft is spherical. Grooves are arranged at both ends of the filter screen fixing frame, and the end part of the pin shaft passes through the clamping groove and abuts against the inside of the groove.

[0014] The utility model provides a filtering and heat dissipation device for a DC charging cabinet, which improves the safety and stability of the operation of the DC charging cabinet, the DC power supply system and even the power plant, reduces the workload of power outage maintenance of the DC power supply system, saves manpower and material costs, and has high economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following further describes the utility model with reference to the drawings and embodiments:

[0016] Figure 1 is the front view of the overall structure of the utility model;

[0017] Figure 2 is the rear view of the overall structure of the utility model;

[0018] Figure 3 is the front view of the unfolded filtering and heat dissipation device of the utility model;

[0019] Figure 4 is the front view of the combined filtering and heat dissipation device of the utility model;

[0020] Figure 5 is the front cross-sectional view of the filtering and heat dissipation device of the utility model;

[0021] Figure 6 is the front cross-sectional view of the connection of the locking mechanism of the utility model;

[0022] In the figure: DC charging cabinet body 1; top heat dissipation frame 2; cabinet body fan air inlet 3; fan air inlet 4; cabinet body fan air outlet 5; fan air outlet 6; installation frame 7; card slot 8; fan 9; locking mechanism 10; filter screen fixing frame 11; filter screen 12; handle 13; fixing cylinder 14; spring 15; pin shaft 16. Specific implementation manner

[0023] As Figures 1 to 6 shown, a filtering and heat dissipation device for a DC charging cabinet includes a high-frequency switching power supply module installed inside a DC charging cabinet body 1. Both ends of the high-frequency switching power supply module are provided with a fan air inlet 4 and a fan air outlet 6. The fan air inlet 4 and the fan air outlet 6 are respectively fixed on the front and rear cabinet doors of the DC charging cabinet body 1 for dissipating heat from the heat sources inside the cabinet.

[0024] The top of the DC charging cabinet body 1 is provided with a top heat dissipation frame 2 communicated therewith. Both ends of the top heat dissipation frame 2 are provided with a cabinet body fan air inlet 3 and a cabinet body fan air outlet 5 for dissipating heat at the top of the cabinet body.

[0025] Filtering and heat dissipation devices are installed on each air outlet and air inlet. Multiple fans 9 are fixedly arranged inside an installation frame 7 in the filtering and heat dissipation device. A card slot 8 is fixedly arranged on the outer side of the installation frame 7. A slidable filter screen fixing frame 11 is arranged in the card slot 8. One side of the card slot 8 is open. Locking mechanisms 10 are arranged at both ends of the card slot 8. The locking mechanisms 10 are used to fix the filter screen fixing frame 11. The DC charging cabinet body 1 adopts a strengthened structure, and its protection level is improved to IP30 or above. The front door of the DC charging cabinet body 1 is mainly made of tempered glass. A fan air inlet 4 is installed near the high-frequency switching power supply module, and a filtering and heat dissipation device is installed at the fan air inlet 4. The rear door of the DC charging cabinet body 1 adopts a steel plate mother-daughter door structure, and the door beam does not block the high-frequency switching power supply module. A fan air outlet 6 is installed near the high-frequency switching power supply module, and a filtering and heat dissipation device is installed at the fan air outlet 6. The top heat dissipation frame 2 at the top of the DC charging cabinet is sealed to prevent dust from falling, and filtering and heat dissipation devices are installed at the cabinet body fan air inlet 3 and the cabinet body fan air outlet 5 before and after the top heat dissipation frame 2, which can quickly discharge the hot air when it rises and accumulates. When the temperature control device measures that the temperature inside the cabinet reaches the limit value, the fan is automatically started to blow the hot air inside the cabinet out of the cabinet.

[0026] The filtering and heat dissipation device is composed of an installation frame, a fan, a card slot, a filter screen fixing frame and a locking mechanism. Among them, the filter screen fixing frame can slide in the card slot for easy maintenance; the locking mechanism ensures the safe locking of the filter screen fixing frame.

[0027] Preferably, the blowing surface of the fan 9 at the air outlet faces outward, and the air suction surface of the fan 9 at the air inlet faces outward. By forcing air flow to accelerate heat exchange, the temperature of the DC charging cabinet is effectively managed. At the same time, the fans at the air inlet and air outlet work together to form a closed air circulation system, which helps to maintain the cleanliness inside the cabinet and the long-term stability of the equipment.

[0028] Preferably, a flange is fixedly provided in the middle of the mounting frame 7, and the flange is fixed to each air outlet and air inlet by bolts. Through the combined use of the flange and bolts, the filter and heat dissipation device of the DC charging cabinet not only achieves effective heat management and air filtration, but also ensures the reliability and maintainability of the equipment.

[0029] Preferably, cross-shaped stoppers are fixedly provided on both sides of the filter screen fixing frame 11, and a filter screen 12 is provided inside the filter screen fixing frame 11.

[0030] The cross-shaped stoppers increase the overall rigidity of the filter screen fixing frame, prevent deformation during long-term use or under external force, and ensure the stability and reliability of the filter screen fixing frame during the sliding and fixing processes. The stoppers can play a positioning role to ensure that the filter screen is accurately installed in the fixing frame, prevent displacement or vibration under the impact of air flow, reduce noise and improve the filtration efficiency. The design of the cross-shaped stoppers makes the installation and disassembly of the filter screen 12 more convenient, without the need for additional tools. Maintenance personnel can easily remove and replace the dirty filter screen, reducing the maintenance difficulty and time cost. The reasonably designed stoppers can also help optimize the air flow distribution, avoid a decrease in filtration efficiency caused by too high local air flow velocity, and reduce the noise problem caused by uneven air flow. The stoppers also play a role in blocking larger particle dust and foreign objects to a certain extent. Especially when the filter screen is contaminated, the stoppers can prevent large particle substances from directly contacting and damaging the internal electronic equipment.

[0031] Preferably, a handle 13 is fixedly provided on the outer side of one end of the filter screen fixing frame 11. It is convenient for manual operation to pull the filter screen fixing frame 11 away from the locking mechanism 10 through the handle 13.

[0032] Preferably, the fixed cylinder 14 in the locking mechanism 10 is fixed on the card slot 8. A sliding pin shaft 16 is provided inside the fixed cylinder 14. A spring 15 is provided between the pin shaft 16 and the fixed cylinder 14. One end of the spring 15 abuts against the inside of the fixed cylinder 14, and the other end abuts against the pin shaft 16.

[0033] The end of the pin shaft 16 is spherical. Grooves are provided at both ends of the filter screen fixing frame 11. The end of the pin shaft 16 passes through the card slot 8 and abuts against the grooves.

[0034] The fixing cylinder 14 is fixed to the outside of the slot 8, while the pin 16 can slide in the fixing cylinder 14. One end of the pin 16 is spherical, which helps it to be more stably positioned in the groove and better adapt to angle changes when inserted and removed. The spring 15 is located between the pin 16 and the fixing cylinder 14, with one end against the inner wall of the fixing cylinder 14 and the other end against the pin 16. The spring 15 provides elastic force to keep the pin 16 under outward pressure, ensuring that the spherical end of the pin 16 can be tightly pressed against the grooves at both ends of the filter screen fixing frame 11, thereby fixing the filter screen fixing frame.

[0035] When the filter fixing frame 11 is correctly inserted into the slot 8, the spherical ends of the pin 16 will automatically slide into the grooves at both ends of the filter fixing frame to complete the locking. If the filter fixing frame 11 needs to be removed, just apply enough force to compress the spring 15 to retract the pin 16 to release the locking state, and then the filter fixing frame 11 can be easily pulled out of the slot 8.

[0036] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A filtering and heat dissipation device for a DC charging cabinet, comprising a high-frequency switching power supply module installed inside a DC charging cabinet (1), characterized in that: The high-frequency switching power supply module is provided with a fan air inlet (4) and a fan air outlet (6) at both ends, and the fan air inlet (4) and the fan air outlet (6) are respectively fixed on the cabinet doors at the front and rear of the DC charging cabinet (1) for dissipating heat from the heat source in the cabinet; A top heat dissipation frame (2) is provided on the top of the DC charging cabinet (1) and is in communication with the cabinet. Cabinet fan air inlets (3) and cabinet fan air outlets (5) are provided at two ends of the top heat dissipation frame (2) for dissipating heat at the top of the cabinet. A filtering and cooling device is installed on each air outlet and air inlet. A plurality of fans (9) are fixedly arranged in an installation frame (7) in the filtering and cooling device. A slot (8) is fixedly arranged on the outer side of the installation frame (7). A sliding filter screen fixing frame (11) is arranged in the slot (8). One side of the slot (8) is open. Locking mechanisms (10) are arranged at both ends of the slot (8). The locking mechanisms (10) are used to fix the filter screen fixing frame (11).

2. According to the filtering and heat dissipation device of the DC charging cabinet of claim 1, it is characterized by: The blowing surface of the fan (9) at the air outlet faces outwards, and the suction surface of the fan (9) at the air inlet faces outwards.

3. According to the filtering and heat dissipation device of the DC charging cabinet of claim 1, it is characterized by: A flange is fixedly provided in the middle of the installation frame (7), and the flange is fixed to each air outlet and air inlet by bolts.

4. According to claim 1, a filtering and heat dissipation device for a DC charging cabinet is characterized in that: Cross blocks are fixedly arranged on both sides of the filter screen fixing frame (11), and a filter screen (12) is arranged inside the filter screen fixing frame (11).

5. According to the filtering and heat dissipation device of the DC charging cabinet of claim 1, it is characterized by: A handle (13) is fixedly provided on the outer side of one end of the filter screen fixing frame (11).

6. According to claim 1, a filtering and heat dissipation device for a DC charging cabinet is characterized in that: A fixed cylinder (14) in the locking mechanism (10) is fixed on the clamping groove (8), a sliding pin shaft (16) is arranged in the fixed cylinder (14), a spring (15) is arranged between the pin shaft (16) and the fixed cylinder (14), one end of the spring (15) abuts against the fixed cylinder (14), and the other end abuts against the pin shaft (16); The end of the pin shaft (16) is spherical, and grooves are provided at both ends of the filter screen fixing frame (11). The end of the pin shaft (16) passes through the clamping groove (8) and abuts against the groove.

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