Heat recovery system, control method and air conditioning unit

Abstract

The invention discloses a heat recovery system, a control method and an air conditioning unit, the heat recovery system comprises at least one heat recovery unit which is arranged in parallel, each heat recovery unit is provided with a water chilling unit, a heat exchange device, a cold source tail end, a heat recovery device and a heat source tail end, and the water chilling unit or the heat exchange device supplies cold to the cold source tail end; the heat recovery device recovers waste heat generated after heat exchange of the cold source tail end to supply heat to the heat source tail end. And when the heat load demand of the heat recovery unit is excessive, the heat load is consumed by adjusting the working state of the heat exchange device and / or the water chilling unit, so that the tail end temperature balance of the heat recovery unit is maintained. When the heat load demand is excessive, the heat load is consumed by adjusting the working states of the heat exchange device and the water chilling unit, the heat before entering the heat recovery device is controlled, temperature balance of the cold source tail end and the heat source tail end is achieved, the situation that shutdown is caused by too large temperature fluctuation is avoided, and the system operation stability is improved.

Description

technical field [0001] The present invention relates to the technical field of air-conditioning units, in particular to a heat recovery system, a control method and an air-conditioning unit. Background technique [0002] The heat released by the chiller through the condenser is usually discharged to the surrounding environment by the cooling tower or cooling fan. While the heat is wasted in large quantities, it also pollutes the surrounding environment. A large amount of waste heat is recovered from the outside world, and then supplied to places that require heat, such as hotels, factories, hospitals, etc., to improve energy utilization. [0003] At present, the conventional heat recovery systems on the market only consider the different recovery methods of heat recovery and the supply site of the recovered heat. When there is excess heat in the heat recovery, the temperature of the end of the cold source is unstable and the temperature of the end of the heat source is too h...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defect of unstable terminal temperature in the prior art, the present invention proposes a heat recovery system, a control method and an air conditioning unit. The heat recovery system consumes heat load when the heat load demand is excessive, maintains the terminal temperature balance of the heat recovery unit, and improves System stability and efficiency

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