Internal and external circulation control device for switch cabinets in substation and control method thereof
A technology of internal and external circulation and control devices, which is applied in the cooling/ventilation of substation/switchgear, substation/distribution device shell, non-electric variable control, etc. It can solve the problems of low component life, poor dehumidification effect, and dehumidification capacity of dehumidification equipment Insufficient and other problems, to achieve the effect of rapid drying and air supply, improved dehumidification effect, and easy control
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Embodiment 1
[0014] Embodiment 1: as Figure 1-Figure 4 As shown, a switch cabinet internal and external circulation control device in a substation includes three air supply fans, an exhaust fan, a controller, three air supply valves and an exhaust air valve, three air supply fans, an exhaust fan, three air supply valves and an exhaust air valve. The valves are electrically connected to the controller respectively, and the controller is also connected with 11 temperature and humidity sensors, which are installed in 11 switch cabinets in the bus room, and the three blowers are respectively connected to three groups of switch cabinets through branch pipes, among which There are four switchgears, four switchgears and three switchgears in the three groups respectively.
[0015] The controller is also connected with a heater and a silica gel temperature and humidity sensor in the silica gel box.
Embodiment 2
[0016] Embodiment 2: A control method for the internal and external circulation control device of the switchgear in the substation, the method is: collect the temperature and humidity in the switchgear through the temperature and humidity sensor, and when the humidity in each group is greater than the set threshold xRH%, then open The air supply valve of this road is activated, and the air supply valve of this road is activated for dehumidification.
[0017] A control method for the internal and external circulation control device of the switchgear in the substation. If the silica gel temperature and humidity sensor detects that the humidity in the silica gel box is greater than the set threshold y RH%, close the three air supply valves, open the exhaust air valve, and start the exhaust fan And the heater is used to heat and dehumidify the silica gel box.
[0018] Such as figure 2 It is the logic diagram of the air circulation dehumidification control of the switchgear, 1#~1...
Embodiment 3
[0020] Embodiment 3: as Figure 2-4 As shown, a switch cabinet dehumidification device in a substation includes a silica gel box 1, the silica gel box 1 is a strip structure, and a plurality of partitions 3 with air holes 2 are arranged in the silica gel box 1 along the length direction, and the adjacent partitions 3 A layer of rubber particles 4 is arranged between them. One end of the length direction of the silica gel box 1 is provided with an air intake pipe 5, and the other end is provided with an exhaust pipe 6 connected to the dehumidification box 15 and a heated exhaust pipe 10. The air intake pipe 5 is provided with a solenoid valve. 7. An exhaust fan 8 and a solenoid valve 2 9 are installed on the exhaust pipe 6, and the heating exhaust pipe 10 is connected to the outside world, and a solenoid valve 3 11 and a heating exhaust fan 12 are installed on it, and a heater is installed on the partition 3 13. A filter screen is provided at the end of the intake pipe 5 .
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