Heat dissipation system of high-voltage frequency converter

Abstract

The utility model discloses a heat dissipation system of a high-voltage frequency converter, which comprises a machine room, a frequency converter cabinet, an air conditioner, a cooling fan, a ventilation pipe, a temperature sensor, a micro differential pressure sensor and a control box, the air conditioner and the frequency converter cabinet are arranged in the machine room, and an indoor air outlet of the ventilation pipe is arranged at the top of the frequency converter cabinet. An outdoor air outlet of the ventilation pipe extends out of the machine room, the cooling fan is arranged in the ventilation pipe, the two ends of the cooling fan are provided with an indoor exhaust valve and an outdoor exhaust valve respectively, the machine room is provided with a room door and a ventilation window, a shutter is arranged on the outer side of the ventilation window, a primary filter screen is arranged on the inner side of the ventilation window, and the temperature sensor is arranged on the outer wall of the machine room. And the control box and the micro differential pressure sensor are arranged on the inner wall of the machine room. The internal and external circulation device can be automatically switched according to the indoor and outdoor temperature difference and the indoor pressure, the indoor environment temperature of the frequency converter is ensured to be within a reasonable range, negative pressure can be prevented from being generated in the frequency converter, and dust can be effectively prevented from entering the frequency converter.

Description

Technical Field

[0001] The utility model belongs to the field of high-voltage inverter heat dissipation, and in particular relates to a high-voltage inverter heat dissipation system. Background Art

[0002] In the high-voltage inverter room, the heat dissipation system mainly includes internal circulation and external circulation.

[0003] Internal circulation heat dissipation usually refers to the use of cabinet top fans, air conditioners and other equipment in the inverter room for regulation, and the heat generated by the equipment is removed through air flow. The fan can carry the heat inside the inverter to other areas of the room through air flow, and use the cooling function of the air conditioner to reduce the indoor temperature to a suitable range, thereby meeting the heat dissipation requirements of the high-voltage inverter. However, this method consumes relatively large amounts of energy, requires a large amount of electricity, and has high requirements for the integrity of the air conditioner. Air conditioner failure may affect the normal operation of the inverter.

[0004] External circulation cooling refers to using external air to cool the inverter. This usually involves introducing external cold air, discharging heat outdoors through the cooling fan and air duct of the high-voltage inverter, and using the negative pressure in the room to draw outdoor air into the room. This method can effectively reduce the temperature of the equipment and improve the heat dissipation efficiency. However, outdoor air enters the room through the air inlet, and an air purification device is usually required at the air inlet. The filter element is affected by external factors, is exposed to a large amount of dust, is easily blocked, and needs to be replaced frequently. The blockage of the filter element will reduce the cooling air volume in the inverter room, indirectly causing the internal temperature to rise, reducing the reliability and life of the inverter. At the same time, a large negative pressure will be formed in the inverter room, making it difficult to open the escape door of the room, which is not conducive to the entry and exit of personnel and the evacuation of personnel in emergency situations. Summary of the invention

[0005] To solve the above problems, the utility model discloses a high-voltage inverter heat dissipation system, which automatically switches between internal and external circulation to ensure that the indoor ambient temperature of the inverter is within a reasonable range, avoids negative pressure in the inverter room, and effectively prevents dust from entering.

[0006] In order to achieve the above object, the technical solution of the utility model is as follows:

[0007] A high-voltage inverter heat dissipation system comprises a machine room, a frequency converter cabinet, an air conditioner, a cooling fan, a ventilation duct, a temperature sensor, a micro-pressure difference sensor, and a control box, wherein the air conditioner and the frequency converter cabinet are arranged in the machine room, the indoor air outlet of the ventilation duct is arranged on the top of the frequency converter cabinet, and the outdoor air outlet of the ventilation duct extends out of the machine room, the cooling fan is arranged in the ventilation duct, and indoor exhaust valves and outdoor exhaust valves are respectively arranged at both ends of the cooling fan, the machine room is provided with a door and a ventilation window, the outer side of the ventilation window is a shutter, and the inner side is a primary filter, the temperature sensor is arranged on the outer wall of the machine room, and the control box and the micro-pressure difference sensor are arranged on the inner wall of the machine room.

[0008] As a supplement to the present invention, the frequency converter cabinet includes a transformer cabinet, a power cabinet and a control cabinet.

[0009] As a supplement to the present invention, a ventilation filter is provided on the cabinet door of the frequency converter cabinet.

[0010] As a supplement to the present invention, the control box is connected to the air conditioner, the cooling fan, the temperature sensor, the micro-pressure difference sensor, the indoor exhaust valve and the outdoor exhaust valve.

[0011] As a supplement to the present invention, the outdoor air outlet of the ventilation pipe is bent downward.

[0012] As a supplement to the present invention, a mesh grille is provided at the outdoor air outlet of the ventilation pipe.

[0013] The beneficial effects of the utility model are:

[0014] The utility model discloses a high-voltage inverter heat dissipation system, which can automatically switch internal and external circulation devices according to the indoor and outdoor temperature difference and the indoor pressure, ensure that the indoor ambient temperature of the inverter is within a reasonable range, avoid negative pressure in the inverter room, and effectively prevent dust from entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the utility model.

[0016] Figure 2 It is a side view of the utility model.

[0017] List of Figure Symbols:

[0018] 1. Computer room, 2. Inverter cabinet, 3. Air conditioner, 4. Ventilation duct, 5. Temperature sensor, 6. Micro-pressure difference sensor, 7. Indoor air outlet of ventilation duct, 8. Outdoor air outlet of ventilation duct, 9. Indoor exhaust valve, 10. Outdoor exhaust valve, 11. Cooling fan, 12. Door, 13. Ventilation window, 14. Shutters, 15. Primary filter, 16. Transformer cabinet, 17. Power cabinet, 18. Control cabinet, 19. Ventilation filter, 20. Grille, 21. Control box. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. It should be understood that the following specific implementations are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0020] As shown in the figure, a high-voltage inverter heat dissipation system described in the utility model includes a machine room 1, a frequency converter cabinet 2, an air conditioner 3, a cooling fan 11, a ventilation pipe 4, a temperature sensor 5, a micro-pressure difference sensor 6, and a control box 21. The air conditioner 3 and the frequency converter cabinet 2 are arranged in the machine room 1, the indoor air outlet 7 of the ventilation pipe is arranged on the top of the frequency converter cabinet 2, and the outdoor air outlet 8 of the ventilation pipe extends out of the machine room 1. The cooling fan 11 is arranged in the ventilation pipe 4, and the two ends of the cooling fan 11 are respectively provided with an indoor exhaust valve 9 and an outdoor exhaust valve 10. The machine room 1 is provided with a door 12 and a ventilation window 13. The number and area of ​​the ventilation window 4 are determined according to the heat dissipation of the high-voltage inverter; the outer side of the ventilation window is a shutter 14, and the inner side is a primary filter 15. The temperature sensor 5 is arranged on the outer wall of the machine room 1, and the control box 21 and the micro-pressure difference sensor 6 are arranged on the inner wall of the machine room 1.

[0021] The utility model describes a high-voltage inverter heat dissipation system that can automatically switch internal and external circulation devices according to the indoor and outdoor temperature difference and the indoor pressure. When the outdoor temperature sensor 5 detects that the temperature is lower than the set temperature and the air filtration facility is in normal working condition, the outdoor exhaust valve 10 is opened, the indoor exhaust valve 9 is closed, the external circulation mode is turned on, and the air conditioner 3 in the machine room assists in cooling.

[0022] When the outdoor temperature is high, or the indoor micro-pressure difference sensor 6 detects a large indoor negative pressure, the device automatically opens the indoor exhaust valve 9, closes the outdoor exhaust valve 10, and starts the internal circulation mode. If the primary filter 15 is blocked, the micro-pressure difference sensor 6 in the machine room detects the indoor negative pressure and alarms on the automatic control system to remind the on-duty personnel to clean and maintain the filter element.

[0023] The inverter cabinet 2 of the utility model comprises a transformer cabinet 16, a power cabinet 17 and a control cabinet 18. A ventilation filter 19 is provided on the cabinet door of the inverter cabinet 2 to effectively prevent dust from entering.

[0024] The control box 21 of the utility model is connected to the air conditioner 3, the cooling fan 11, the temperature sensor 5, the micro-pressure difference sensor 6, the indoor exhaust valve 9 and the outdoor exhaust valve 10 through a control system, and the control box 21 is set on the wall near the ventilation pipe 4.

[0025] The outdoor air outlet 8 of the ventilation pipe of the utility model is bent downward to prevent rainwater from entering; a mesh grille 20 is provided at the outdoor air outlet 8 of the ventilation pipe to prevent small animals from entering by mistake.

[0026] A plurality of air conditioners 3 can be placed in the machine room 1, and when working, the temperature in the machine room can be quickly lowered to a suitable range.

[0027] It should be noted that the above content only illustrates the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications all fall within the protection scope of the claims of the utility model.

Claims

1. A high voltage inverter heat dissipation system, characterized in that: It includes a machine room, a frequency converter cabinet, an air conditioner, a cooling fan, a ventilation duct, a temperature sensor, a micro-pressure difference sensor, and a control box. The air conditioner and the frequency converter cabinet are arranged in the machine room, the indoor air outlet of the ventilation duct is arranged on the top of the frequency converter cabinet, and the outdoor air outlet of the ventilation duct extends out of the machine room. The cooling fan is arranged in the ventilation duct, and indoor exhaust valves and outdoor exhaust valves are respectively arranged at both ends of the cooling fan. The machine room is provided with a door and a ventilation window, the outer side of the ventilation window is a shutter, and the inner side is a primary filter. The temperature sensor is arranged on the outer wall of the machine room, and the control box and the micro-pressure difference sensor are arranged on the inner wall of the machine room.

2. A high-voltage inverter heat dissipation system according to claim 1, characterized in that: The frequency converter cabinet comprises a transformer cabinet, a power cabinet and a control cabinet.

3. A high-voltage inverter heat dissipation system according to claim 1, characterized in that: A ventilation filter is provided on the cabinet door of the frequency converter cabinet.

4. A high-voltage inverter heat dissipation system according to claim 1, characterized in that: The control box is connected to the air conditioner, the cooling fan, the temperature sensor, the micro-pressure difference sensor, the indoor exhaust valve and the outdoor exhaust valve.

5. The high-voltage inverter heat dissipation system according to claim 1, characterized in that: The outdoor air outlet of the ventilation pipe is bent downward.

6. A high-voltage inverter heat dissipation system according to claim 1, characterized in that: A mesh grille is provided at the outdoor air outlet of the ventilation pipe.

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