Twin-stage heat recovery large enthalpy difference dehumidification fresh air conditioner and control method thereof

Abstract

The invention discloses a twin-stage heat recovery large enthalpy difference dehumidification fresh air conditioner, and belongs to the field of energy utilization technology and air conditioning. The twin-stage heat recovery large enthalpy difference dehumidification fresh air conditioner comprises a fresh air ventilator, an exhaust fan, an air-air heat recovery device and a large enthalpy difference surface air cooler. A unit is divided into a fresh air channel and an exhaust channel, the large enthalpy difference surface air cooler in the fresh air channel is used for cooling and more thoroughly dehumidifying fresh air, a total heat recovery device is used for recovering total heat of the fresh air and exhaust air, and the fresh air is pre-cooled. A sensible heat recovery device is used for heating the fresh air with low dew point temperature and passing the large enthalpy difference surface air cooler and reducing relative humidity relative to the high-temperature exhaust air, and the cooled exhaust air is beneficial to pre-cooling the fresh air. An energy storage water cooling system provides low-temperature chilled water, and the fresh air is more thoroughly dehumidified. By the aid of the dehumidification fresh air conditioner, the treated fresh air can reach low moisture content needed by an independent temperature and humidity control system, and the total load of the fresh air, total latent heat load and part of sensible heat load of indoor air can be borne.

Description

technical field [0001] The invention relates to a heat recovery and dehumidification fresh air conditioner, in particular to a two-stage heat recovery and large enthalpy difference dehumidification fresh air conditioner. Background technique [0002] Most of the air-conditioning systems in civil buildings in my country adopt the mixed mode of fresh return air. Since most of the air circulates indoors, pollutants cannot be discharged outdoors quickly, which is harmful to human health. Increasing the fresh air volume (or adopting fresh air operation mode) can dilute indoor harmful substances and discharge them to the outside, significantly improving indoor air quality; but on the other hand, the increase in fresh air volume greatly increases the energy consumption of fresh air treatment. In addition, the air treatment methods currently use ordinary 7 / 12°C chilled water or direct evaporation dehumidification methods. This air-conditioning method has the following disadvantages:...

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Problems solved by technology

[0007] The object of the present invention is to provide a two-stage heat recovery large enthalpy difference dehumidification fresh air air conditioner and its control method with simple and reasonable structure, stable operation, low energy consumption and low operating cost, so as to overcome and improve the deficiencies in the prior art

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