Air conditioner temperature and humidity decoupling system and control method thereof

Abstract

The invention relates to the technical field of building energy conservation and air conditioner ventilation control, in particular to an air conditioner temperature and humidity decoupling system anda control method thereof. According to the system, temperature and humidity measurement signals are collected, the water inlet temperature of a tail end coiled pipe and the amount of air entering a room are adjusted according to changes of cold and wet loads, and temperature and humidity decoupling control of an air conditioner system and indoor thermal comfort control are completed. On the otherhand, the system utilizes an electric three-way valve and a variable frequency fan to control the water inlet temperature and the water outlet temperature of the tail end coiled pipe and the air supply amount, then the relative humidity and temperature of the room are kept constant, reheating is not needed, and unnecessary energy waste is avoided. The air conditioner temperature and humidity decoupling system is simple in structure, automatic in control, reliable in performance, high in energy-saving potential and capable of being widely applied in building air conditioning systems.

Description

technical field [0001] The invention relates to the technical fields of building energy saving and air-conditioning ventilation control, in particular to an air-conditioning temperature-humidity decoupling system and a control method thereof. Background technique [0002] The indoor thermal and humid environment has a great impact on the thermal comfort of the human body. With the improvement of the quality of life, a single temperature control can no longer meet people's thermal comfort needs. In the air conditioning system, the temperature and humidity control of the room has the characteristics of strong nonlinearity and strong coupling. The traditional air conditioning system (such as the primary return air system) generally uses the end coil to cool and dehumidify the air to control the temperature, and heat it through the reheating device. Air is used to control the temperature, which will cause a large waste of energy and the system structure is also complicated. If ...

AI Technical Summary

Problems solved by technology

[0002] The indoor hot and humid environment has a great impact on the thermal comfort of the human body. With the improvement of the quality of life, a single temperature control can no longer meet people's needs for thermal comfort.

In the air conditioning system, the temperature and humidity control of the room has the characteristics of strong nonlinearity and strong coupling. The traditional air conditioning system (such as the primary return air system) generally uses the end coil to cool and dehumidify the air to control the temperature, and heat it through the reheating device. Air is used to control the temperature, which will cause a large waste of energy and the system structure is also complicated

If reheating is not carried out, in order to avoid condensation, the temperature of the air supply should not be too low, and the humidity level of the room cannot be guaranteed at this time

Here, some people propose to use dry coils to bear the indoor heat load, and the solution dehumidification system controls the humidity to ensure a hot and humid environment in the room. However, due to the complex structure of the solution dehumidification system and the unstable performance of dehumidification materials, it is not suitable for use in current air conditioning systems. widely

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