Heat dissipation and ventilation system for high-voltage frequency converter of power distribution room

Abstract

The invention provides a heat dissipation and ventilation system for a high-voltage frequency converter of a power distribution room. The heat dissipation and ventilation system comprises heat dissipation windows, heat dissipation air channels and axial flow fans, the heat dissipation window is arranged below the distribution room wall; the axial flow fan is arranged at the top of the high-voltage frequency converter cabinet; a first port of the heat dissipation air channel at least covers an air outlet of the axial flow fan, and a second port of the heat dissipation air channel penetrates out of the power distribution room from the wall of the power distribution room. The axial flow fan at the top of the high-voltage frequency converter cabinet is utilized, heat generated by the phase-shifting transformer, the power unit and the control cabinet is directly discharged out of the power distribution room through the heat dissipation air duct, the environment temperature in the power distribution room is effectively reduced, and it is ensured that the high-voltage frequency converter operates within the optimal temperature range. By eliminating a refrigeration air conditioner in the distribution room, the energy consumption is obviously reduced, the operation cost is reduced, and the energy-saving effect is obvious.

Description

Technical Field

[0001] The invention relates to the technical field of heat dissipation and ventilation of a high-voltage frequency converter in a power distribution room, and in particular to a heat dissipation and ventilation system for a high-voltage frequency converter in a power distribution room. Background Art

[0002] In the power system, high-voltage inverters are important power electronic devices and are widely used in various industrial and commercial occasions. However, high-voltage inverters generate a lot of heat during operation. If this heat cannot be dissipated in time, it will cause the equipment to overheat, seriously affecting its operating effect and service life.

[0003] The heat of high-voltage inverters mainly comes from phase-shifting transformers, power units, and control systems. In particular, the heat dissipation design of power devices (such as IGBTs or IGCTs) that serve as electronic switches in the main circuit is particularly critical. The PN junction temperature of the power device must not exceed 125°C, and the package shell temperature should be controlled within 85°C. If the operating temperature exceeds the above limit, it will cause the high-voltage inverter to alarm, and even cause high-temperature tripping, which will seriously affect the operating stability and reliability of the equipment.

[0004] Therefore, how to design an efficient, stable and reliable heat dissipation and ventilation system that can effectively reduce the operating temperature of the high-voltage inverter and reduce energy consumption and maintenance costs has become a problem that needs to be solved urgently. Summary of the invention

[0005] The object of the present invention is to provide a heat dissipation and ventilation system for a high-voltage frequency converter in a power distribution room.

[0006] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0007] A heat dissipation and ventilation system for a high-voltage frequency converter in a power distribution room, comprising a heat dissipation window, a heat dissipation air duct and an axial flow fan;

[0008] The heat dissipation window is arranged below the wall of the power distribution room;

[0009] The axial flow fan is arranged on the top of the high-voltage frequency converter cabinet;

[0010] The first port of the heat dissipation duct at least covers the air outlet of the axial flow fan, and the second port of the heat dissipation duct passes through the wall of the power distribution room to the outside of the power distribution room.

[0011] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0012] As a preferred technical solution of the present invention: the heat dissipation window is a shutter.

[0013] As a preferred technical solution of the present invention: the axial flow fan is provided by the high-voltage frequency converter.

[0014] As a preferred technical solution of the present invention: the heat dissipation duct includes a high-voltage inverter outlet heat dissipation guide duct pipe, a heat dissipation duct straight pipe section and an outdoor rain and dustproof duct opening connected in sequence. The heat dissipation duct straight pipe section plays a guiding role and has no exhaust resistance.

[0015] As a preferred technical solution of the present invention: the heat dissipation guide air duct pipe at the air outlet of the high-voltage inverter is made of an arc-shaped air guide plate, has aerodynamic flow field characteristics for smooth air circulation, and can effectively reduce exhaust resistance.

[0016] As a preferred technical solution of the present invention: the heat dissipation guide air duct pipe at the air outlet of the high-voltage inverter, the heat dissipation air duct straight pipe section and the outdoor rain and dustproof air duct outlet are connected by bolts to form a sealed air duct, thereby forming an efficient exhaust system to efficiently discharge the hot air generated by the high-voltage inverter to the outdoors.

[0017] As a preferred technical solution of the present invention: the outdoor rainproof and dustproof air duct opening is made into a downward exhaust curved air duct elbow.

[0018] As a preferred technical solution of the present invention: a protective net is set at the free end of the outdoor rain and dustproof air duct opening, mainly considering that rainwater enters the high-voltage inverter heat dissipation air duct due to rainy and windy weather outside; and preventing small animals, insects, etc. from entering the high-voltage inverter heat dissipation air duct during the shutdown period of the high-voltage inverter.

[0019] As a preferred technical solution of the present invention: the material of the heat dissipation duct is one or more of aluminum alloy, stainless steel, thermoplastic plastic and glass fiber reinforced plastic.

[0020] The present invention provides a heat dissipation and ventilation system for a high-voltage frequency converter in a power distribution room, which has the following beneficial effects:

[0021] 1) Efficient heat dissipation: The present invention utilizes the axial flow fan on the top of the high-voltage inverter cabinet to directly discharge the heat generated by the phase-shifting transformer, power unit and control cabinet to the outside of the power distribution room through the heat dissipation duct, effectively reducing the ambient temperature in the power distribution room and ensuring that the high-voltage inverter operates within the optimal temperature range.

[0022] 2) Energy saving and consumption reduction: By eliminating the refrigeration and air conditioning in the distribution room, energy consumption is significantly reduced, operating costs are reduced, and significant energy-saving effects are achieved.

[0023] 3) Reduce failure rate and maintenance costs: Due to the significant heat dissipation effect, the equipment runs more stably and reliably, reducing fault alarms and high-temperature tripping caused by overheating, thereby reducing failure rate and maintenance costs.

[0024] 4) System simplification: Ventilation shutters are set at the bottom of the distribution room wall and heat dissipation ducts are set above the high-voltage inverter. The whole system has fewer hardware equipment, simple structure, and is easy to install and maintain.

[0025] 5) Rainproof and dustproof design: The outdoor rainproof and dustproof air duct opening of the heat dissipation air duct is designed as a downward exhaust curved duct elbow, and a protective net is added to effectively prevent rainwater and small animals from entering the heat dissipation air duct, ensuring the normal operation and service life of the equipment.

[0026] 6) Wide applicability: It is not only suitable for high-voltage inverters, but also has a good reference role in the natural heat dissipation and ventilation of other heat-generating electrical equipment, and has a certain degree of representativeness.

[0027] 7) No later operating costs: No additional maintenance and energy consumption expenses are required in the later operation. The operation is efficient and the energy-saving effect is significant, which further reduces the overall operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of the heat dissipation and ventilation system for the high-voltage frequency converter in the power distribution room provided by the present invention;

[0029] In the figure: 1- shutter; 2- heat dissipation guide air duct pipe at the air outlet of high-voltage inverter; 3- straight pipe section of heat dissipation air duct; 4- outdoor rain and dust proof air duct outlet. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1 As shown, a heat dissipation and ventilation system for a high-voltage inverter in a power distribution room includes a heat dissipation window, a heat dissipation air duct and an axial flow fan;

[0032] The heat dissipation window is arranged below the wall of the power distribution room. In this embodiment, the heat dissipation window is a shutter 1;

[0033] The axial flow fan is arranged on the top of the high-voltage frequency converter cabinet. In this embodiment, the axial flow fan is provided by the high-voltage frequency converter.

[0034] The first port of the heat dissipation duct at least covers the air outlet of the axial flow fan. In this embodiment, the first end of the heat dissipation duct covers the top of the high-voltage inverter cabinet; the second port of the heat dissipation duct passes through the wall of the distribution room to the outside of the distribution room.

[0035] The heat dissipation duct includes a high-voltage inverter outlet heat dissipation guide duct pipe 2, a heat dissipation duct straight pipe section 3 and an outdoor rain and dustproof duct opening 4 which are connected in sequence. The heat dissipation duct straight pipe section plays a guiding role and has no exhaust resistance.

[0036] The heat dissipation and diversion air duct pipe 2 at the air outlet of the high-voltage frequency converter is made of an arc-shaped air guide plate, with the characteristics of a smooth air flow field for air circulation, which can effectively reduce the exhaust resistance.

[0037] The heat dissipation and diversion air duct pipe 2 at the air outlet of the high-voltage frequency converter, the straight section 3 of the heat dissipation air duct, and the outdoor rainproof and dustproof air duct opening 4 are bolted together to form a sealed air duct, thus forming an efficient exhaust system to efficiently discharge the hot air generated by the high-voltage frequency converter outdoors.

[0038] The outdoor rainproof and dustproof air duct opening 4 is made into a downward-exhaust curved air duct elbow, and a protective net is set at the free end of the outdoor rainproof and dustproof air duct opening 4, mainly considering that in rainy and windy weather outdoors, rainwater enters the heat dissipation air duct of the high-voltage frequency converter; and to prevent small animals, insects, etc. from entering the heat dissipation air duct of the high-voltage frequency converter during the shutdown period of the high-voltage frequency converter.

[0039] The material of the heat dissipation air duct is one or more of aluminum alloy, stainless steel, thermoplastic plastic, and glass fiber reinforced plastic.

[0040] Specifically, during the operation of the high-voltage frequency converter, the axial flow fan on the top of the high-voltage frequency converter cabinet operates, and the heat generated is discharged to the heat dissipation air duct through the ventilation air duct opening on the high-voltage frequency converter cabinet and then discharged outdoors through the heat dissipation air duct; at the same time, an air pressure difference will be formed inside and outside the power distribution room, and the outdoor natural cold air will enter the power distribution room through the louvers 1 set above and below the power distribution room wall.

[0041] A suitable material for the external heat dissipation air duct of the high-voltage frequency converter is crucial for the normal operation of the equipment. When selecting materials, considerations should be made in terms of heat conduction performance, high-temperature resistance performance, corrosion resistance performance, and flame retardant performance, etc., and the most suitable material should be comprehensively selected; common materials include aluminum alloy, stainless steel, thermoplastic plastic, and glass fiber reinforced plastic, etc.

[0042] The above specific implementation manners are used to explain and illustrate the present invention, which are only the preferred embodiments of the present invention, rather than a limitation to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and protection scope of the claims of the present invention all fall within the protection scope of the present invention.

Claims

1. A high-voltage frequency converter heat dissipation and ventilation system for a power distribution room, characterized in that: Including heat dissipation window, heat dissipation duct and axial flow fan; The heat dissipation window is arranged below the wall of the power distribution room; The axial flow fan is arranged on the top of the high-voltage frequency converter cabinet; The first port of the heat dissipation duct at least covers the air outlet of the axial flow fan, and the second port of the heat dissipation duct passes through the wall of the power distribution room to the outside of the power distribution room.

2. The high-voltage frequency converter heat dissipation and ventilation system for the power distribution room according to claim 1, wherein: The heat dissipation windows are shutters.

3. The high-voltage frequency converter heat dissipation and ventilation system for the power distribution room according to claim 1, wherein: The axial flow fan is provided by the high-voltage frequency converter.

4. The high-voltage frequency converter heat dissipation and ventilation system for the power distribution room according to claim 1, wherein: The heat dissipation air duct comprises a heat dissipation guide air duct pipe at an air outlet of a high-voltage frequency converter, a heat dissipation air duct straight pipe section and an outdoor rain and dust proof air duct opening which are connected in sequence.

5. The high-voltage frequency converter heat dissipation and ventilation system for the power distribution room according to claim 4, wherein: The heat dissipation and flow guide air duct pipe at the air outlet of the high-voltage inverter is made of an arc-shaped air guide plate.

6. The high-voltage frequency converter heat dissipation and ventilation system for the power distribution room according to claim 4, wherein: The heat dissipation guide air duct pipe at the air outlet of the high-voltage frequency converter, the heat dissipation air duct straight pipe section and the outdoor rain and dust proof air duct opening are connected by bolts to form a sealed air duct.

7. The high-voltage frequency converter heat dissipation and ventilation system for the power distribution room according to claim 4, characterized in that: The outdoor rainproof and dustproof air duct opening is made into a downward exhaust curved air duct elbow.

8. The high-voltage frequency converter heat dissipation and ventilation system for the power distribution room according to claim 7, characterized in that: A protective net is arranged at the free end of the outdoor rainproof and dustproof air duct opening.

9. The high-voltage inverter heat dissipation and ventilation system for a distribution room according to claim 1 or 3, characterized in that: The material of the heat dissipation air duct is one or more of aluminum alloy, stainless steel, thermoplastic plastic and glass fiber reinforced plastic.

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