Working method of heat-recovery multi-connected air conditioning unit

Abstract

The invention discloses a working method of a heat-recovery multi-connected air conditioning unit. When a wind-side heat exchanger works and two water-side heat exchangers do not work, a four-way valve can control refrigerating fluid to pass through the wind-side heat exchanger so as to realize the refrigeration or heat production of the unit; when a first water-side heat exchanger and the wind-side heat exchanger do not work and a second water side heat exchanger works, the four-way valve can control the refrigerating fluid to pass through the second water-side heat exchanger so as to realize whole heat recovery; and when the wind-side heat exchanger does not work and the two water-side heat exchangers work, the four-way valve can control the refrigerating fluid to pass through the two water-side heat exchangers so as to realize whole heat recovery and partial heat recovery. Because of varied selectivity, the invention can choose to operate refrigeration or heat production, or add whole heat recovery or add whole heat recovery or partial heat recovery. The invention has varied selectivity, convenient use and energy saving.

Description

technical field [0001] The invention relates to a working method of a heat recovery multi-connected air conditioner unit. Background technique [0002] A conventional refrigeration unit consists of a compressor, condenser, evaporator, refrigeration system accessories and connecting pipelines to form a refrigeration cycle. This unit can only provide cold air in summer, and the heat it discharges is cooled by cooling water. The tower releases heat into the atmosphere. In order to better save energy and reduce operating costs, it is hoped that the unit can provide a large amount of domestic hot water free of charge for people to use while cooling. In response to the above situation, two heat recovery methods have emerged in the industry. One is the total heat recovery at the expense of the performance of the compressor. The cooling capacity of the machine decreases, the power increases, and the refrigeration performance coefficient (EER) decreases; the other is the partial he...

AI Technical Summary

Problems solved by technology

In response to the above situation, two heat recovery methods have emerged in the industry. One is the total heat recovery at the expense of the performance of the compressor. The cooling capacity of the machine decreases, the power increases, and the refrigeration performance coefficient (EER) decreases; the other is the partial heat recovery with low heat recovery efficiency. Only the energy of the sensible heat part of the compressor exhaust, the recovery rate is low

When the refrigeration unit with the above two heat recovery methods is in use, it will generate hot water at the same time, which is not selective and inconvenient to use; however, when people do not need hot water, it will cause waste of resources and affect the efficiency of the refrigeration unit. work efficiency

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