Reset control method of multi-connected internal electronic expansion valve

Abstract

The invention discloses a reset control method of an indoor unit electronic expansion valve of a multi-coupled air conditioner. The method is characterized in that whether the indoor unit electronic expansion valve is reset or not is judged, if yes, the next step is directly carried out, and if not, the indoor unit electronic expansion valve is closed with the maximum aperture and 100 steps, 80 steps are needed for opening, 80 steps are needed for closing, the indoor unit electronic expansion valve is marked as the reset, and then the next step is carried out; and after a multi-coupled air conditioner unit receives a starting instruction, whether the indoor unit electronic expansion valve needs to be started or not is judged, if yes, the indoor unit electronic expansion valve is started and the started indoor unit electronic expansion valve is marked as the non-reset, the multi-coupled air conditioner unit runs according to the starting instruction, and after a shutdown instruction is received, the indoor electronic expansion valve is closed with the current running aperture and 100 steps, and the closed indoor unit electronic expansion valve is marked as the reset. According to the method, it can be avoided that the adjusting frequency of the indoor unit electronic expansion valve is too high, and the number of adjusting steps is too large.

Description

technical field [0001] The invention relates to a control method of an air conditioner, in particular to a reset control method of a multi-line internal unit electronic expansion valve. Background technique [0002] The multi-connected air-conditioning unit in the prior art is usually used in conjunction with one outdoor unit and multiple indoor units, and can simultaneously adjust the temperature of multiple rooms. After the multi-split unit is powered on, it is necessary to reset the indoor electronic expansion valve of each indoor unit so that the opening degree is unified to 0 degrees, which is convenient for subsequent control. The reset control method of the electronic expansion valve of the internal machine in the prior art is that after each power-on, since the specific opening degree of each electronic expansion valve of the internal machine is not clear, all the electronic expansion valves of the internal machine are unified according to the set step number. (gene...

AI Technical Summary

Problems solved by technology

Assuming that a certain indoor unit has not been turned on all the time, and the user will power off the unit once every day after get off work, and turn on the unit again the next day, then for the electronic expansion valve of the indoor unit, the valve needle and the electronic expansion valve of the indoor unit will be turned off every day. The nozzle is extruded 600 times, and the stress generated by the extrusion will continue to accumulate and cannot be released. If this happens for a long time, it will easily cause the electronic expansion valve of the internal machine to malfunction, resulting in failure to open or close tightly.