Heating-based defrost control method of multi-split air-conditioning system
A multi-connected air conditioner and control method technology, applied in the field of air conditioning, can solve the problems of indoor temperature drop and affect indoor human comfort, and achieve the effect of avoiding temperature drop
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[0025] Such as figure 2 As shown, the present invention provides a heating and defrosting control method for a multi-line air-conditioning system. Each indoor unit and outdoor unit are respectively provided with an on-off valve (preferably an expansion valve) that controls their respective operations. When the system is under indoor heating operation, judge whether the entire system meets the defrosting conditions. If the defrosting conditions are met, switch the four-way valve action to make the outdoor mechanism thermally defrost, and adjust multiple indoor units that need to continue heating The on-off valve (preferably the expansion valve) of at least one indoor unit is closed, and the on-off valve (preferably the expansion valve) of at least one of the remaining indoor units is adjusted to open, so that at least one of the above-mentioned specific indoor units that need to continue heating is not Cooling down.
[0026] The control method of the present invention makes the h...
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