Improved multi-split system and control method thereof

Abstract

The invention relates to an improved multi-split system which comprises a compressor, outdoor heat exchangers and indoor heat exchangers. The two outdoor heat exchangers, namely, a heat exchanger I and a heat exchanger II are arranged; the multiple indoor heat exchangers are arranged; the first end of the heat exchanger I is respectively connected to an air suction port of the compressor through an electromagnetic valve I and connected to an exhaust port of the compressor through an electromagnetic valve II; the first end of the heat exchanger II is respectively connected to the air suction port of the compressor through an electromagnetic valve IV and connected to the exhaust port of the compressor through an electromagnetic valve III; the second end of the heat exchanger I and the secondend of the heat exchanger II are mutually connected in parallel so as to be connected to the middle end of each indoor heat exchanger; and the middle ends respectively pass through a heating one-wayvalve and a refrigerating one-way valve so as to be connected to liquid ends and gas ends of the indoor heat exchangers. The improved multi-split system provided by the invention can be used for heating and refrigerating at the same time so as to meet the multi-mode operation requirement of a user, and heat recovery is realized. The energy demand matching problem during small-load operation can befurther solved, and the energy utilization rate is improved.

Description

technical field [0001] The invention relates to an air conditioner, in particular to a multi-connection system, in particular to an improved multi-connection system and a control method thereof. Background technique [0002] With the development of multi-connected air conditioner technology, single-mode operation units can no longer meet the needs of users. For example, in changing seasons, different indoor units of the same multi-connected system may have different requirements, requiring the units to provide cooling and heating functions at the same time; in public places such as hotels and guesthouses, a user of the multi-connected In the operation mode (such as turning on the heating mode by mistake in summer), other users with normal needs will not be able to open the desired operation mode due to problems such as mode conflicts, causing inconvenience. On the other hand, with the improvement of awareness of energy saving and emission reduction, the demand for heat reco...

AI Technical Summary

Problems solved by technology

These problems are difficult to be properly solved by the current multi-connected system operating in a single mode

[0003] In addition, the continuous improvement of the single unit capacity of multi-connected outdoor units will inevitably bring about problems such as small-load operation, especially in cooling mode. Excessively high output of outdoor units not only poses challenges to the reliable and long-term operation of the unit, but also leads to problems with multi-connected units. Reduced operating efficiency of the system, resulting in energy waste

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