Control method for outdoor direct current fan of variable frequency air conditioner

Abstract

The invention relates to control technologies of variable frequency air conditioners, discloses a control method for an outdoor direct current fan of the variable frequency air conditioner, and solves the problem that in traditional technologies, the revolving speed of the outdoor direct current fan of the variable frequency air conditioner cannot be matched with a system optimally, and as a result, the capacity and the reliability of the system are influenced. The method comprises the steps that the original revolving speed of the direct current fan is determined according to the frequency of a compressor and the outdoor environment temperature; in the running process of the compressor, the revolving speed of the direct current fan is adjusted in real time according to current system parameters, such as the outdoor coil temperature, the IPM temperature, the exhaust temperature and the environment temperature, and the stepless speed regulation function of the fan revolving speed is achieved; and after the compressor is stopped, the outdoor coil temperature and the IPM temperature are detected, whether the fan runs or not, the running speed of the fan and the running time of the fan are determined according to the temperatures. According to the control method, compared with an original control scheme in which the fan is stopped when the compressor is stopped, the temperature of the corresponding system can be reduced rapidly, the method is beneficial to shortening the time of system recovery due to the fact that the overheated system results in shut down of the compressor, and the time interval of once again start of the compressor is shortened.

Description

technical field [0001] The invention relates to the control technology of the frequency conversion air conditioner, in particular to a control method of the outdoor DC fan of the frequency conversion air conditioner. Background technique [0002] Good heat exchange is the prerequisite for the normal and stable operation of the air conditioning system. The outdoor DC fan of the inverter air conditioner is used for heat exchange of the outdoor evaporator. The heat transfer effect is related to the speed of the DC fan. additional power consumption. Therefore, the DC fan has a great impact on the system. If the working speed of the DC fan can best match the system, it will be of great benefit to improve the energy efficiency of the system. [0003] The outdoor DC fan of the inverter air conditioner has multiple wind speed gears. The existing control scheme is that different compressor operating frequency ranges correspond to different wind speed gears. Generally, when the comp...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose a control method for the outdoor DC fan of the inverter air conditioner, which solves the problem in the traditional technology that the speed of the outdoor DC fan of the inverter air conditioner cannot be optimally matched with the system, which affects the system capability and reliability

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