Chilled water pipeline for central air conditioner

Abstract

The invention discloses a chilled water pipeline for a central air conditioner, which is characterized in that firstly, the chilled water from a water chilling unit flows into fresh air handling units in air conditioned areas so as to process outdoor fresh air and carry out moisture load and partial thermal load by a fresh air handling chamber; then, the chilled water flows through indoor air conditioners in the air conditioned areas; and finally, the chilled water flows back to the water chilling unit by a water circulating pump. So that the loads of the indoor air conditioners are reduced, and the area of a coiled tube is reduced; the coiled tube runs under a dry working condition, therefore, a condensed water pipeline is saved, and the indoor environment is more sanitary; and because the indoor air conditioners are not required to remove the moisture excess of indoor air, the water supply temperature and the backwater temperature of the chilled water are increased, and the energy efficiency ratio of a refrigerating system is improved, therefore, the refrigerating system is more energy-saving. A certain relationship exists between the change in fresh air load and the change in moisture load, the air conditioner zoning is performed, and the air conditioner areas are connected by parallel pipelines, therefore, the air conditioners can be subjected to zoning control according to the changes in fresh air loads and moisture loads of different air conditioner areas, and the air handling situation of the fresh air handling unit is changed according to the running changes of the indoor air conditioners, so, the adaptive capability of the system is strong.

Description

technical field [0001] The invention relates to a central air conditioner, in particular to a chilled water pipeline of the central air conditioner. Background technique [0002] Circulating chilled water is the main cooling method in the central air-conditioning system. The main structure includes circulating water pumps, chillers, fresh air units and indoor air conditioners, and they are connected by chilled water pipelines. Among the above-mentioned components of common central air conditioners at present, the chilled water pipeline between the fresh air unit and the indoor air conditioner is connected in parallel. The indoor air conditioner handles the indoor heat and humidity load, and the fresh air unit only handles the fresh air load. This structure has the following disadvantages: First, in order to remove the residual humidity in the room, the temperature of the chilled water supply and return water is low, and the energy efficiency ratio of the system is low; secon...

AI Technical Summary

Problems solved by technology

Among the above-mentioned components of common central air conditioners at present, the chilled water pipeline between the fresh air unit and the indoor air conditioner is connected in parallel. The indoor air conditioner handles the indoor heat and humidity load, and the fresh air unit only handles the fresh air load. This structure has the following disadvantages: First, in order to remove the residual humidity in the room, the temperature of the chilled water supply and return water is low, and the energy efficiency ratio of the system is low; second, the surface of the indoor air conditioner coil is prone to condensate water, which is prone to bacteria growth and water leakage to pollute the ceiling; the third is fresh air The main cause of the load and the indoor humidity load is the indoor personnel. The two loads are related to each other. Using the parallel pipeline of the fresh air unit and the indoor air conditioner prevents the fresh air unit from automatically changing according to the load of the indoor air conditioner, which is not conducive to energy saving; four. It is an indoor air conditioner that handles all the heat and humidity loads in the room. It requires a large coil area and takes up a lot of space.

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