A temperature control method for a power distribution cabinet

Abstract

The invention discloses a power distribution cabinet. The power distribution cabinet comprises a cabinet body, wherein a ventilation hole is formed in the top of the cabinet body, and one circle of first mounting holes are formed in the periphery of the ventilation hole; dense screw holes are formed in a backing plate of the cabinet body, the back of the cabinet body is connected with a back cavity, and a frame type sealing strip is arranged between the backing plate and the back cavity; and a fan is arranged at the lower part of the back cavity. According to the power distribution cabinet disclosed by the invention, airflow is blown out from the back cavity and the screw holes in the backing plate when the fan rotates forwards and supplies the air inwards, and the blown-out wind is directly blown onto electrical components, so that the airflow can be pushed toward the ventilation hole in the top to be blown out, and heat dissipation effect is better. The invention also discloses a temperature control system and a temperature control method of the power distribution cabinet, when the temperature of the power distribution cabinet is lower than TA, the power distribution cabinet at higher temperature can carry out temperature compensation on the power distribution cabinet at low temperature through an air duct for preventing condensation, so that the temperature of the power distribution cabinet at the low temperature rises; and the temperature in the power distribution cabinet can be better controlled, so that the power distribution cabinet can meet temperature demand during operation, the use safety is improved, and the service lives of the electrical components are prolonged.

Description

technical field [0001] The invention relates to electric equipment, in particular to a power distribution cabinet and a temperature control system and method for the power distribution cabinet. Background technique [0002] The power distribution cabinet is a commonly used power equipment. It is used to install electrical components. The electrical components will generate heat when they are in use. Therefore, a fan is usually installed on the power distribution cabinet. The fan is generally located on the side of the power distribution cabinet. The windshield, the fan position draws air outside, and the windshield enters the wind, thereby reducing the temperature inside the power distribution cabinet. However, in this way, the contact surface between the circulating air and the electrical components is small, which affects the heat dissipation effect. The problem of short service life. [0003] On the other hand, the temperature in the power distribution cabinet should not...

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Problems solved by technology

[0002] The power distribution cabinet is a commonly used power equipment. It is used to install electrical components. The electrical components will generate heat when they are in use. Therefore, a fan is usually installed on the power distribution cabinet. The fan is generally located on the side of the power distribution cabinet. The windshield, the fan position draws air outside, and the windshield enters the wind, thereby reducing the temperature inside the power distribution cabinet. However, in this way, the contact surface between the circulating air and the electrical components is small, which affects the heat dissipation effect. The problem of short service life

[0003] On the other hand, the temperature in the power distribution cabinet should not be too low, because the air temperature is low, its ability to be saturated with water will become poor, and condensation will easily form on the surface of electrical components. The impact of water on the electrical system is destructive. The loss caused by the short circuit is difficult to estimate

For this reason, a heating type dehumidifier is also installed in the power distribution cabinet. The heating type dehumidifier is mainly realized by increasing the temperature in the power distribution cabinet. Since the air with a higher temperature can contain more moisture, it prevents water vapor from directly entering the cabinet. Condensation on electrical equipment, terminal blocks, etc. in the cabinet prevents accidents such as flashovers and short circuits; however, setting a heating dehumidifier in a cabinet is a waste of space and cost, and after all, the power distribution cabinet needs to dissipate heat. Lord, the less heating the better

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