Fresh air handling unit based on hexagonal plate heat exchanger

Abstract

The fresh air handling unit comprises a heat recovery unit, a heat pump unit and a spraying unit, the heat recovery unit is a plate heat exchanger, a first air duct and a second air duct which are alternately distributed are arranged in the plate heat exchanger, and two ports of the first air duct are correspondingly located on the upper left side and the upper right side of the plate heat exchanger; a water through hole is formed in the bottom of the first air duct, two end openings of the second air duct are correspondingly located on the lower left side and the lower right side of the plate heat exchanger, the heat pump unit comprises a compressor, a first condenser, an expansion valve and an evaporator which are sequentially connected end to end through pipelines, and the spraying unit comprises a water collecting tank and a sprayer. The water collecting tank and the sprayer are connected through a pipeline provided with a circulating pump, fresh air flows through a second air channel of the plate heat exchanger from left to right and a channel of the evaporator are provided with an air supply channel, and return air flows through a first air channel of the plate heat exchanger from right to left and a channel of the first condenser are provided with an air exhaust channel. The air conditioner has the advantages of being high in functionality, good in stability, small in wind resistance, low in energy consumption and high in efficiency.

Description

technical field [0001] The invention relates to an air conditioner, in particular to a fresh air unit based on a hexagonal plate exchange. Background technique [0002] In the field of building energy saving and air conditioning, it is usually necessary to process the fresh air to meet the demand, that is, to cool and dehumidify the air in summer, and to heat and humidify the air in winter. The refrigeration equipment used in this field is mainly a heat pump, which is composed of a compressor, an evaporator, a condenser, and an expansion valve. During operation, the refrigerant is converted between gas and liquid through the compressor and expansion valve. On the one hand, the refrigerant releases heat at the condenser and discharges the heat through the return air; on the other hand, the refrigerant absorbs heat at the evaporator to reduce the temperature of the fresh air, thereby achieving the purpose of cooling and dehumidification. But the fresh air unit based on the he...

AI Technical Summary

Problems solved by technology

But the fresh air unit based on the heat pump has a relatively low dehumidification capacity per unit of electric energy. For this reason, those skilled in the art have developed a double cold source fresh air unit. The dehumidification effect is improved, and on the other hand, the purpose of energy saving is realized by setting up a heat recovery device composed of two plate heat exchangers, but the heat recovery device with this structure has the following problems in practical application: 1. Setting up two side-by-side The plate heat exchanger not only increases the volume of the unit, but also increases the difficulty of air duct layout; 2. Because the flow directions of the two internal air ducts of the existing plate heat exchanger are perpendicular to each other, this will cause the change of the internal air duct of the unit. Larger range, resulting in large wind resistance, affecting the effect of energy saving and consumption reduction

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