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

Abstract

The utility model provides a heat dissipation and ventilation system for a high-voltage frequency converter in 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. According to the utility model, 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 the high-voltage frequency converter is ensured to operate in an 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 utility model relates to the technical field of power distribution room high voltage frequency changer heat dissipation ventilation, specifically to a power distribution room high voltage frequency changer heat dissipation ventilation system. BACKGROUND

[0002] In the power system, high voltage frequency changer as important power electronic equipment, is widely used in various industrial and commercial occasions. However, high voltage frequency changer will produce a large amount of heat in the operation process. If these heat cannot be dissipated in time, will lead to equipment overheating, seriously affect its operation effect and service life.

[0003] The heat of high voltage frequency changer mainly comes from phase-shifting transformer, power unit and control system etc. Especially as the power device (such as IGBT or IGCT) of main circuit electronic switch, its heat dissipation design is particularly critical. The PN junction temperature of power device must not exceed 125 DEG C, and the temperature of package shell should be controlled within 85 DEG C. If the operating temperature exceeds the above limit, will lead to high voltage frequency changer operation alarm, and even cause high temperature trip, seriously affect the operation stability and reliability of equipment.

[0004] Therefore, how to design a kind of efficient, stable, reliable heat dissipation ventilation system, both can effectively reduce the working temperature of high voltage frequency changer, and can reduce energy consumption and maintenance cost, become the problem to be solved urgently at present. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of power distribution room high voltage frequency changer heat dissipation ventilation system.

[0006] Therefore, the above purpose of the utility model is realized by the following technical schemes:

[0007] A kind of power distribution room high voltage frequency changer heat dissipation ventilation system, including heat dissipation window, heat dissipation air duct and axial flow fan;

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

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

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

[0011] While the above technical scheme is used, the utility model can also use or combine the following technical schemes:

[0012] As a preferred technical scheme of the utility model: the heat dissipation window is louver.

[0013] As a preferred technical scheme of the utility model: the axial flow fan is high pressure frequency converter self -bearing.

[0014] As a preferred technical scheme of the utility model: the heat dissipation air duct includes high pressure frequency converter air outlet heat dissipation flow guide duct pipe, heat dissipation air duct straight pipe section and outdoor rainproof dustproof air duct mouth that are connected in turn. The heat dissipation air duct straight pipe section plays the flow guiding effect, and there is no exhaust resistance.

[0015] As a preferred technical scheme of the utility model: the high pressure frequency converter air outlet heat dissipation flow guide duct pipe is made of circular arc air deflector, has the air power flow field characteristics of smooth air circulation, and can effectively reduce exhaust resistance.

[0016] As a preferred technical scheme of the utility model: the high pressure frequency converter air outlet heat dissipation flow guide duct pipe, heat dissipation air duct straight pipe section and outdoor rainproof dustproof air duct mouth are connected by bolts to form a sealed air duct, thereby forming an efficient exhaust system, and the hot air generated by the high pressure frequency converter is efficiently exhausted outside.

[0017] As a preferred technical scheme of the utility model: the outdoor rainproof dustproof air duct mouth is made into a downward exhaust curved air duct elbow.

[0018] As a preferred technical scheme of the utility model: a protective net is arranged at the free end of the outdoor rainproof dustproof air duct mouth, mainly considering that rain and wind weather outside causes rainwater to enter the high pressure frequency converter heat dissipation air duct, and preventing small animals, insects and the like from entering the high pressure frequency converter heat dissipation air duct during shutdown of the high pressure frequency converter.

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

[0020] The utility model provides a kind of high pressure frequency converter heat dissipation ventilation system of distribution room, with following beneficial effects:

[0021] 1) efficient heat dissipation: the utility model utilizes the axial flow fan of high pressure frequency converter cabinet top, and the heat generated by phase displacement transformer, power unit and control cabinet is directly discharged to distribution room outside by heat dissipation air duct, effectively reduces the ambient temperature in distribution room, and ensures that high pressure frequency converter operates in optimum temperature range.

[0022] 2) energy saving and cost reduction: by canceling the refrigeration air conditioner in distribution room, energy consumption is significantly reduced, operating cost is reduced, and significant energy-saving effect is achieved.

[0023] 3) reduce failure rate and maintenance cost: due to the significant heat dissipation effect, the equipment operates more stably and reliably, reduces the fault alarm and high-temperature trip phenomenon caused by overheating, thereby reducing the failure rate and maintenance cost.

[0024] 4) System simplification: The system adopts ventilation louvers installed below the wall of the power distribution room and heat dissipation ducts installed above the high-voltage frequency converter. The whole system has fewer hardware devices, simple structure, and is easy to install and maintain.

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

[0026] 6) Wide applicability: It is not only applicable to high-voltage frequency converters, but also has a good reference value for the natural heat dissipation and ventilation of other heat-generating electrical equipment, and has a certain representativeness.

[0027] 7) No post-operation costs: No additional maintenance or energy expenditure is required during post-operation. It is highly efficient and energy-saving, further reducing the overall operating cost. Attached Figure Description

[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 this utility model;

[0029] In the diagram: 1- Louver; 2- High-voltage frequency converter air outlet heat dissipation and airflow duct; 3- Straight section of heat dissipation duct; 4- Outdoor rainproof and dustproof air duct opening. Detailed Implementation

[0030] The present invention will be further described in 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 frequency converter in a power distribution room includes heat dissipation windows, heat dissipation ducts, and an axial flow fan.

[0032] The heat dissipation window is located at the bottom of the wall of the power distribution room. In this embodiment, the heat dissipation window is a louver 1.

[0033] The axial flow fan is installed on the top of the high-voltage frequency converter cabinet. In this embodiment, the axial flow fan is integrated into the high-voltage frequency converter.

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

[0035] The cooling duct includes, in sequence, the high-voltage inverter outlet cooling guide duct 2, the cooling duct straight section 3, and the outdoor rainproof and dustproof duct outlet 4. The cooling duct straight section serves as a guide and has no exhaust resistance.

[0036] The high-pressure frequency converter air outlet heat dissipation guide air duct pipe 2 is made of a circular arc air deflector, has the air power flow field characteristics of smooth air flow, and can effectively reduce the air exhaust resistance.

[0037] The high-pressure frequency converter air outlet heat dissipation guide air duct pipe 2, the heat dissipation air duct straight pipe section 3 and the outdoor rainproof and dustproof air duct opening 4 are connected by bolts to form a sealed air duct, thereby forming an efficient air exhaust system to efficiently exhaust the hot air generated by the high-pressure frequency converter to the outside.

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

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

[0040] Specifically, in the operation of the high-pressure frequency converter, the axial flow fan at the top of the high-pressure frequency converter cabinet operates, the generated heat is exhausted to the heat dissipation air duct through the ventilation net opening on the high-pressure frequency converter cabinet, and the heat is exhausted to the outside through the heat dissipation air duct; at the same time, an air pressure difference is formed between the inside and outside of the power distribution room, and the outdoor natural cool air enters the power distribution room through the louvers 1 arranged on the upper and lower parts of the power distribution room wall.

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

[0042] The above specific embodiments are used to explain and illustrate the present application, and are only preferred embodiments of the present application, rather than limiting the present application, and any modification, equivalent replacement, improvement and the like made to the present application within the spirit of the present application and the protection scope of the claims all fall within the protection scope of the present application.

Claims

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

2. The power distribution room high voltage frequency converter cooling and ventilation system of claim 1, wherein: The heat dissipation window is a louver window.

3. The power distribution room high voltage variable frequency drive cooling and ventilation system of claim 1, wherein: The axial flow fan is self-provided by the high-voltage frequency converter.

4. The power distribution room high voltage variable frequency drive cooling and ventilation system of claim 1, wherein: The heat dissipation air duct includes a high-voltage frequency converter air outlet heat dissipation flow guide air duct pipe, a heat dissipation air duct straight pipe section and an outdoor rainproof and dustproof air duct port connected in sequence.

5. The power distribution room high voltage variable frequency drive cooling and ventilation system of claim 4, wherein: The high-voltage frequency converter air outlet heat dissipation flow guide air duct pipe is made of a circular arc-shaped air deflector.

6. The power distribution room high voltage variable frequency drive cooling and ventilation system of claim 4, wherein: The high-voltage frequency converter air outlet heat dissipation flow guide air duct pipe, the heat dissipation air duct straight pipe section and the outdoor rainproof and dustproof air duct port are connected by bolts to form a sealed air duct.

7. The power distribution room high voltage variable frequency drive cooling and ventilation system of claim 4, wherein: The outdoor rainproof and dustproof air duct port is made into a downward air exhaust curved air duct elbow.

8. The power distribution room high voltage variable frequency drive cooling and ventilation system of claim 7, wherein: A protective net is arranged at the free end of the outdoor rainproof and dustproof air duct port.

9. The power distribution room high voltage variable frequency drive heat removal ventilation system of claim 1 or 3, wherein: The material of the heat dissipation air duct is one or more of aluminum alloy, stainless steel, thermoplastic and glass fiber reinforced plastic.

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