A multi-connected air conditioner outdoor unit system and defrosting method thereof

Abstract

The invention discloses a multi-split air-conditioner outdoor unit system and a defrosting method thereof. The defrosting method is suitable for the multi-split air-conditioner outdoor unit system; the coaction of a four-way valve and an electromagnetic throttling valve is adopted to control, so that heating is continuously operated, each module of an outdoor unit realizes independent defrosting,and defrosting is fast; the method uses a compressor of a traditional system for independent defrosting by each module; the hardware design of a multi-split air-conditioning system is little changed,so that the overall structural adjustment of the outdoor unit system is reduced; and when continuous heating is guaranteed during defrosting, the structural cost is reduced, and excellent user experiences are realized.

Description

technical field [0001] The invention belongs to the field of air conditioner defrosting, and in particular relates to a multi-connected air conditioner outdoor unit system and a defrosting method thereof. Background technique [0002] Air source heat pump air-conditioning system heating and defrosting in winter is unavoidable. Conventional four-way valve reversing defrosting causes large indoor temperature fluctuations and poor user experience; especially the modular multi-line piping system is complicated. It takes a long time for thermal stabilization and equilibration, and multi-connection customers themselves demand high quality, so they complain a lot about it. [0003] In the prior art, a parallel system of multiple air-conditioning outdoor units (CN204693914U) is disclosed. This system uses two three-way valve structures to realize the original four-way valve reversing function, and can also realize the function of connecting the air pipes of the heat exchanger. Howev...

AI Technical Summary

Problems solved by technology

[0005] Another example is an air source heat pump auxiliary compressor defrosting system (CN102003854A), through the need to add auxiliary defrosting compressors and other components, during defrosting operation, an additional auxiliary compressor is used to start an independent defrosting cycle for defrosting, It can realize continuous heating operation, and the defrosting efficiency is more efficient. Although this method can realize uninterrupted heating and the heating capacity feels better, it needs to add an additional auxiliary defrosting compressor, and the cost is relatively high.

Images