Proportional-adjustable secondary air return air conditioning system with reheater

Abstract

The invention discloses a proportion-adjustable secondary air return air conditioning system with a reheater and belongs to the technical field of air conditioning. The system comprises an air handling unit, a service room, an air supply pipeline, an air return pipeline and a fresh air pipeline, an analog quantity electric control valve is arranged on a primary air return pipeline, and an electric control valve is arranged on a secondary air return pipeline. The problems that a traditional secondary air return system is low in dew point and cannot be controlled are mainly solved. The system is characterized in that when the heat-humidity ratio of a room served by the air conditioning system is reduced, the dew-point temperature obtained through a traditional calculation method is low, and the requirement for the low dew-point temperature cannot be met by using a conventional cold source. The reheater is additionally arranged, the dew point temperature of the system can be increased when the heat humidity ratio of a room is low, a conventional cold source can meet the using requirement of the system, and the secondary air return system can be effectively controlled. The proportion-adjustable secondary air return air conditioning system can replace a traditional primary air return air conditioning system in the fields of clean air conditioners and other constant-temperature and constant-humidity air conditioners, and has a very good energy-saving effect.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and relates to an energy-saving secondary return air treatment method with an adjustable ratio of a reheater. Background technique [0002] At present, air-conditioning systems that require temperature and humidity control often use a primary return air system in the design of the air-conditioning system. When the primary return air-conditioning system controls humidity, it needs to cool and dehumidify first, and then heat it to the air supply state and send it into the room. In the process of first cooling down and then heating caused by this, the phenomenon of cold and heat offsetting each other occurs, resulting in serious waste of energy. There are also design schemes that adopt a secondary return air system design with a fixed primary and secondary return air ratio, which has a good energy-saving effect, but the primary and secondary air volumes cannot change with load changes, and ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a secondary return air conditioning system with an adjustable ratio of reheater, which can adjust the volume of primary and secondary return air according to the change of indoor load, and can meet the dew point temperature requirements with conventional cold sources, solving the problem of traditional secondary return air conditioning. Uncontrollable problem of low dew point of wind system

Images