Dehumidifying and cooling method for heat exchanger at tail end of central air conditioner

Abstract

The invention relates to a dehumidifying and cooling method for a heat exchanger at the tail end of a central air conditioner. The method comprises the steps that the chilled water temperature and chilled water flow in a tail end heat exchanger, the heat exchange area of the heat exchanger and the environment temperature and humidity are obtained; based on the difference value of the chilled water temperature in the tail end heat exchanger and the environment temperature, the area of the tail end heat exchanger and the environment humidity, the dewing time needed by the tail end heat exchanger and the corresponding air speed are determined; and based on the dewing time and the wind speed of the tail end heat exchanger, the current wind speed of a fan is used as the basis, the preset stepping wind speed is used in the dewing time of the tail end heat exchanger, and the current fan of the tail end heat exchanger is subjected to stepless speed regulation to the corresponding wind speed meeting the dewing time for dehumidification. By obtaining the chilled water temperature of the tail end heat exchanger of the central air conditioner, the heat exchange area of the tail end heat exchanger, the environment temperature and the environment humidity and through the temperature change between the environment temperature and the chilled water temperature, stepless speed change is carried out on the fan of the tail end heat exchanger, air speed dewing dehumidification at a dewing point is achieved, and the optimal dehumidification effect can be achieved.

Description

technical field [0001] The invention belongs to the technical field of central air-conditioning, and in particular relates to a method for dehumidifying and cooling a central air-conditioning terminal heat exchanger. Background technique [0002] Existing central air conditioners usually use a terminal heat exchanger to use a fan to suck indoor air from the air inlet, and then the air that is heated or cooled by the heat exchanger in the terminal heat exchanger is sent out from the air outlet. There is a coil inside the heat exchanger, in which the refrigerated water circulation fluid flows, and there are fins on the coil, the air with a higher temperature in the room sucked by the fan is in contact with the fins for temperature exchange, and the air Adjust temperature rise and fall. Because the high-speed airflow through the fins cannot form condensation, the central air conditioner terminal heat exchanger generally only has the function of air temperature adjustment, and ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing central air-conditioning terminal heat exchanger can only heat up and cool down the air, and cannot effectively remove high humidity and high temperature in the air with low energy consumption, the present invention provides a dehumidification and cooling method for the central air-conditioning terminal heat exchanger, which has the function of dehumidification Good effect, high efficiency and more intelligent

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