变频空调检测（Frequency conversion air conditioner test）.docVIP

变频空调检测（Frequency conversion air conditioner test） In order to repair and maintenance of air conditioner, correct use, understand and grasp the principle of inverter air conditioner, the main components of the structural characteristics and maintenance technology, has become a pressing matter of the moment, the inverter air conditioner than the fixed speed air conditioner control circuit is complex, it is additionally provided with a protection circuit, the circuit uses many different sensing techniques, such as frequency conversion module, Holzer element and the optical coupler, watchdog circuit, switching power supply circuit etc.. On the basis of theoretical study and practical maintenance practice, this article makes a detailed analysis of the control circuit principle and maintenance technology of air conditioner, for the promotion and popularization of frequency conversion technology, to better meet the needs of peoples growing material and cultural life, has important significance. 4 |! H+ P4 Z!]$* d0 I Principle analysis of air conditioner control circuit Inverter air conditioner is the room air conditioner development direction, it through the frequency controller to adjust the compressor speed (frequency), the refrigeration (heat) and room heat (cold), automatic load, the thermostat has fast speed, low heating efficiency, temperature control of high precision, suitable temperature, voltage wide range. Especially with the development of frequency conversion technology, inverter air conditioning from AC to DC brushless motor, permanent magnet synchronous motor frequency, so the inverter air conditioner both from the use of power electronic devices, or control strategy is widely used in the contemporary advanced technology. Whether domestic or imported variable frequency air conditioner, its control circuit principle is basically the same, usually by indoor and outdoor machine control circuit, the following to the United States KFR- 50LW/FBPY as an example to