Heat recovery type multi-stage solution dehumidifying fresh air handling unit

Abstract

The invention relates to a heat recovery type multi-stage solution dehumidifying fresh air handling unit which comprises a fresh air handling channel and a return air handling channel. The fresh air handling channel comprises multiple stages of first solution-air direct contact modules and multiple stages of solution dehumidifiers. The return air handling channel comprises multiple stages of second solution-air direct contact modules and multiple stages of solution regenerators. Each first solution-air direct contact module is connected with the corresponding second solution-air direct contact module through a solution circulating pump to form a solution circulating loop. Each solution dehumidifier is connected with a first solution-water heat exchanger through a solution circulating pump to form a solution circulating loop. Each solution regenerator is connected with a second solution-water heat exchanger through a solution circulating pump to form a solution circulating loop. Each solution dehumidifier is connected with the corresponding solution regenerator in series to form a solution circulating loop. A solution-solution heat exchanger is arranged on the solution circulating loop between each solution dehumidifier and the corresponding solution regenerator.

Description

technical field [0001] The invention relates to a fresh air unit, in particular to a heat recovery type multi-stage solution dehumidification fresh air unit. Background technique [0002] The air humidity treatment process is an important part of the building air conditioning system, and improving the performance of air dehumidification / humidification treatment is one of the key links to realize the efficient operation of the air conditioning system. The air dehumidification method in the existing air conditioning system is mostly based on condensation dehumidification, that is, low-temperature cold water, refrigerant and other refrigerants are used to cool the air below the dew point, so that the moisture in the air condenses to complete the dehumidification process. This dehumidification method requires a low temperature of the cold source (lower than the dew point temperature of the air), resulting in a low evaporation temperature of the refrigeration cycle, thereby limit...

AI Technical Summary

Problems solved by technology

For example, patent CN1865789 discloses a full heat recovery type heat-driven solution dehumidification fresh air unit using return air evaporative cooling, which uses the evaporative cooling process to recover energy from the return air and cool down the solution in the solution dehumidification process, but it only gives The air treatment method on the dehumidification side does not involve the treatment of the solution regeneration process and the composition of the entire unit; patent CN1865788 discloses a heat-driven solution dehumidification fresh air unit that uses cooling water as a cold source, and uses cooling water to dehumidify the air with multi-stage solutions The solution in the treatment process is cooled, and part of the air after dehumidification is used for evaporative cooling to prepare cold water to cool the remaining air after dehumidification, but this patent still does not involve the treatment process of solution regeneration, and it uses the dehumidified air for evaporation Cooling, resulting in a degree of dehumidification - humidification offset, limiting the performance of the unit

[0004] Therefore, there is still a lack of multi-stage heat-driven solution dehumidification devices that can effectively combine heat recovery and solution dehumidification-regeneration cycles

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