Fresh air conditioner with dual evaporating temperatures and control method thereof

Abstract

The invention relates to the technical field of air conditioners, in particular to a fresh air conditioner with dual evaporating temperatures and a control method thereof. The fresh air conditioner comprises a refrigerant circulating system, a fresh air channel and an air exhaust system, wherein the refrigerant circulating system comprises a dual-suction compressor, a four-way valve, a low-temperature evaporator, a high-temperature evaporator, a throttle device and a condenser, which are connected through pipelines; a total heat exchange core body, the high-temperature evaporator and the low-temperature evaporator are sequentially arranged in a fresh air channel in a direction from the outdoor to the indoor; and the total heat exchange core body is arranged in the air exhaust channel. Thefresh air conditioner can use one compressor to realize dual evaporation temperatures, so that sensible heat treatment and latent heat treatment are separately realized on to-be-treated air, and therefore, system refrigerating energy efficiency is improved; and the total heat exchange core body can realize waste heat utilization, so that various treatment processes of air can be realized through one set of equipment; and the fresh air conditioner is simple in structure and is lower in cost.

Description

technical field [0001] The present application relates to the technical field of air conditioning, in particular, to a fresh air air conditioner with dual evaporating temperatures and a control method for the fresh air air conditioner. Background technique [0002] The principle of the traditional fresh air dehumidifier is to cool down the air temperature to the dew point through the evaporator to dehumidify, and then reheat the air through the condenser to raise the air temperature to the air supply state, and then send it into the room. In order to achieve the purpose of dehumidification, the evaporation temperature of the traditional fresh air dehumidifier is usually very low, resulting in low energy efficiency of the system, and the cold / heat in the exhaust air is not recovered, resulting in a large waste of energy. [0003] Patent No. CN201610807963.1 discloses a high-efficiency fresh air dehumidifier based on heat pump heat recovery and dual evaporation temperatures. I...

AI Technical Summary

Problems solved by technology

However, this patent needs to use two compressors, five heat exchangers and five throttling devices, the system structure is complex, the cost is high, and the control is difficult

[0004] Moreover, in the prior art, the fresh air fan only has one mode of fresh air. Under the condition that fresh air is not needed or only a small amount of fresh air is needed, the air volume passing through the indoor heat exchanger is small, which will lead to poor performance of the indoor heat exchanger.

Moreover, because the fresh air fan only has one mode of fresh air, it cannot cool / heat the indoor air. If cooling or heating functions are required, an additional set of air-conditioning equipment is required, resulting in more indoor equipment and higher costs.

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