Frequency converter with anti-freezing and heat-insulating effects

Abstract

The invention discloses a frequency converter with anti-freezing and heat preservation effects. The frequency converter comprises a shell and a circuit board. The frequency converter has the beneficial effects that the temperature in the shell is monitored through a temperature controller, and when the internal temperature is too low, the temperature controller controls a first electric push rod and a second electric push rod to extend to push a first baffle to block an air inlet formed in the surface of an air inlet box and push a second baffle to block an exhaust hole formed in the surface of the shell, so that the shell is closed, and outside air entry is reduced; meanwhile, a constant-temperature heating rod is started to heat air in the shell, so that the interior of the shell is in a constant-temperature state, and the situation that the sensitivity of electric appliance elements on the surface of the circuit board is reduced due to low temperature is avoided, so the anti-freezing and warm-keeping effects are achieved, the device is suitable for the severe cold environment, and weather resistance is improved; and a first heat preservation layer and a second heat preservation layer on the inner wall of the shell and the inner wall of the air inlet box play a heat preservation role, so heat loss is reduced, heat preservation performance is improved, power consumption of the constant-temperature heating rod is reduced, and more energy is saved in use.

Description

technical field [0001] The invention relates to the technical field of frequency converters, in particular to a frequency converter with antifreeze and heat preservation effects. Background technique [0002] The frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the frequency of the motor's working power supply. The frequency converter is mainly composed of rectification (AC to DC), filtering, inverter (DC to AC), braking Unit, drive unit, detection unit, micro-processing unit, etc. The inverter adjusts the voltage and frequency of the output power supply by switching off the internal IGBT, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving energy saving and speed regulation. In addition, the inverter also has many protection functions, such as overcurrent, overvoltage, overload protection, etc. With the continuou...

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Problems solved by technology

[0003] There is a circuit board installed inside the inverter, and various electrical components are integrated on the surface of the circuit board. The traditional inverter does not have the function of antifreeze and heat preservation. It is used in cold weather When the external temperature is low, the sensitivity of the electrical components will decrease, and even the phenomenon of not working will affect the use. In addition, the traditional inverter usually has cooling holes for heat dissipation, which is more convenient for cold air to enter and affect the use. At the same time, in When the temperature is high, the heat dissipation fan installed inside the traditional inverter cannot quickly transport or extract air in time, causing heat to accumulate around the heating electrical components, affecting heat dissipation and thus affecting use. In addition, the traditional circuit board is fixed by bolts. It is troublesome to install and dismantle, and it is not easy to install, dismantle and maintain, and further improvements can be made

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