Frequency conversion module temperature protection device and method and air conditioner

Abstract

The invention provides an air conditioner and a frequency conversion module temperature protection device and method. The frequency conversion module temperature protection device comprises a frequency conversion module, a built-in temperature sensor module, an external temperature sensor module and a control module, wherein the frequency conversion module comprises a device printing circuit board assembly with an intelligent powder module or an insulated gate type bipolar transistor; the built-in temperature sensor module is arranged in the intelligent power module or the insulated gate type bipolar transistor; the external temperature sensor module is arranged in the position, with the highest temperature, outside the intelligent power module or the insulated gate type bipolar transistor; and the control module is connected with the built-in temperature sensor module and the external temperature sensor module and used for controlling the frequency conversion module to enable the corresponding mode according to the detected temperature. According to the air conditioner and the frequency conversion module temperature protection device and method, the frequency limitation and frequency reduction are conducted on the frequency conversion module according to the temperature sensed by the external temperature sensor, the early-warming effect is good, the frequent start and stop of the frequency conversion module are avoided, when to conduct the shutdown protection is determined according to the temperature sensed by the external temperature sensor and the built-in temperature sensor, and the judgment reliability is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a temperature protection device for a frequency conversion module, a temperature protection method for a frequency conversion module, and an air conditioner. Background technique [0002] In existing air-conditioning equipment, it is very common to use frequency conversion modules to control frequency conversion compressors and fans. An important parameter to evaluate the frequency conversion module is temperature. If the temperature is too high, it will cause damage to the IGBT, and even cause damage to other components of the control system. [0003] Most of the existing solutions only sample the internal temperature of the module, and shut down directly when the temperature is too high to achieve the purpose of protection. Some existing sampling circuits have poor control accuracy and large errors. Or only use the internal temperature protection of the module, and ...

AI Technical Summary

Problems solved by technology

Some existing sampling circuits have poor control accuracy and large errors

Or only use the internal temperature protection of the module, and only when the temperature reaches a certain set value, will the protection stop, the early warning effect is poor, the maximum temperature rise is difficult to control, and it is easy to cause IGBT damage

There may be frequent start and stop of the frequency conversion module, which cannot guarantee the limited reliability range and low-capacity operation

Images