Air-conditioning system using terminal box to provide most suitable air quantity

Abstract

The invention discloses an air-conditioning system which supplies the optimum air volume by terminal boxes, mainly arranging a first adjustable baffle at the return air door of each terminal box in the air-conditioning system, letting the opening of the first adjustable baffle to adjust and control its secondary return air volume according to variation of air-conditioning energy requirements in several air-conditioning regions and correspondingly adjusting primary air input volume, automatically adjusting the speed of a fan motor to an optimum air volume according to air volume requirements in several air-conditioning regions, making air-conditioning energy supply automatically balance with air-conditioning load, thus saving energy sources, preventing cold effect and assuring air-conditioning quality.

Description

technical field [0001] The invention relates to an air-conditioning system in which an optimal air volume is provided by a terminal box, in particular to an air-conditioning system in which an optimal air volume can be provided by a terminal box to meet the individual air supply and air-conditioning energy requirements of each air-conditioning area. Background technique [0002] Terminal box 2 configuration of general air-conditioning system (such as figure 1 , figure 2 As shown), a first heat source supply system 1 mainly provides the required heat source (the heat source supply system provides cold air source or warm air source) to more than one air-conditioning area A0, and the terminal box 2 of each air-conditioning area A0 There is a damper 21 at the entrance, and the damper 21 uses an adjustable baffle 211 to control the air volume of the primary air, and uses a fan motor 22 to send air into the air-conditioning area A0 through the air outlet 25, The side edge of th...

AI Technical Summary

Problems solved by technology

Among them, in order to adapt to the change of air-conditioning load, the simplest control method of CAV system is to use water valve to shut off the ice water or hot water entering the heat exchange tube coil. Although this control method is economical and simple, the temperature and humidity in the air-conditioning area will change. The change is too large, the energy control is difficult, and the expected goal cannot be achieved. It does not meet the needs of the times. In order to improve the shortcomings of the CAV system, the water valve adopts a proportional opening and closing method to adjust the air supply temperature. Partial improvement has been made in the aspect of excessive fluctuation, but when the amount of ice / hot water changes, it is difficult to achieve the best balance point for the temperature fluctuation of the pipe and row; In the air-conditioning mode, ideal control can be obtained, but when the ice water flow rate changes in the air-conditioning mode, the average effective temperature of the pipe row also changes, and it is difficult to obtain ideal control in the low sensible heat load environment humidity

As for the VAV system, although it has improved many shortcomings of the traditional CAV system, such as water regurgitation, excessive temperature and humidity fluctuations, and has many advantages such as energy saving, low noise, stable temperature and humidity, and low failure rate, it has many advantages such as low-load operation. , due to insufficient air supply volume, it will lead to poor air circulation in the air-conditioning area, uneven temperature distribution and insufficient external air supplementation, resulting in reduced comfort of personnel, especially the cold current wind chill effect on the weak, and even seriously affects other people. Healthy body

[0005] Because the traditional VAV or CAV systems cannot meet the user's comfort requirements, coupled with human operating factors, the already energy-intensive air-conditioning system has become a new generation of energy killers

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