Novel independent temperature and humidity control method and system

Abstract

The invention discloses a novel independent temperature and humidity control method and system. According to the novel independent temperature and humidity control method, in summer, when the indoor temperature exceeds the first preset temperature, a dehumidification fresh air ventilator is started firstly, a sensible heat multigang machine is started when the dew point temperature of indoor air is lowered to the preset dew point temperature, the evaporating temperature of the sensible heat multigang machine is set as a preset evaporating temperature, and the preset dew point temperature is lower than the preset evaporating temperature; and in winter, when the indoor temperature is lower than the second preset temperature, the dehumidification fresh air ventilator is started to carry out heating and dehumidification on outdoor air and then feeds the outdoor air into a room, and the sensible heat multigang machine is started simultaneously to heat the indoor air. The number of steps of the novel independent temperature and humidity control method is small, the control system is simple in structure, indoor sensible heat loads and latent heat loads can be processed separately, energy consumption is low, and the method and system can well adapt to the change of a dampness-heat ratio.

Description

technical field [0001] The invention relates to the technical field of structural design of an indoor air conditioning system, in particular to a novel temperature and humidity independent control method and control system. Background technique [0002] With the improvement of living standards, people's requirements for living and working environment are getting higher and higher. Starting from the thermal comfort and health of the human body, it is necessary to fully control the indoor temperature, humidity, and air supply mode, so as to provide users with a comfortable living and working environment. The conventional air conditioning system can realize the adjustment of indoor temperature, humidity and air supply mode. However, the system and method of conventional temperature and humidity mixed treatment have the following problems: [0003] 1. Energy waste. Use a system for cooling and dehumidification at the same time. In order to eliminate the residual humidity in th...

AI Technical Summary

Problems solved by technology

[0003] 1. Energy waste

Use one system to perform refrigeration and dehumidification at the same time. In order to eliminate the residual humidity in the room, the evaporation temperature is often controlled very low. However, in the air conditioning system, the sensible heat load that accounts for more than half of the total load, then use the low evaporation temperature to treat the indoor temperature. Sensible heat load will cause waste of energy utilization grade, and although the humidity (moisture content) of the air after condensation and dehumidification meets the requirements, the temperature is too low, and sometimes it needs to be reheated, resulting in further waste and loss of energy ;

[0004] 2. Difficult to adapt to changes in heat-humidity ratio

The heat-humidity ratio actually required by the building has a wide range of changes. Generally, the control of humidity is sacrificed, and the compromise is made by only meeting the requirements of the indoor temperature, resulting in the phenomenon that the indoor relative humidity is too high or too low.

The result of excessive relative humidity is discomfort, which in turn lowers the room temperature set point, improves thermal comfort by lowering the room temperature, and causes an unnecessary increase in energy consumption

Too low relative humidity will also increase the energy consumption of fresh air due to the increase of the enthalpy difference with the outside;

[0005] 3. Decrease indoor air quality

Images