System and method for precise hierarchical control of temperature and humidity

Abstract

The invention discloses a system for precise hierarchical control of temperature and humidity. The system comprises a fresh air passage, a return air passage, an air supply passage, a first dehumidification device and a cooling device, the fresh air passage is joined with the return air passage and connected into the air supply passage, the first dehumidification device is arranged in the fresh air passage, the cooling device is arranged between the output end of the return air passage and the input end of the air supply passage, the output end of the first dehumidification device of the system is further connected with a fresh air passage branch, the output end of the fresh air passage branch is connected into the return air passage, and the fresh air passage branch is provided with a second dehumidification device. Air supply temperature and humidity can be controlled accurately, reheating during temperature and humidity control of a conventional air conditioner is avoided, re-humidification is avoided, energy consumption for system operation is effectively lowered, and energy conservation and environmental protection are realized.

Description

technical field [0001] The invention relates to the technical field of temperature and humidity control, in particular to a system and method for temperature and humidity precision graded control. Background technique [0002] The relevant technological process needs to strictly control the temperature and humidity of the workshop, and be able to adjust it precisely, which puts forward higher requirements for the technological air conditioner. The technological process generally requires a certain amount of fresh air supplement to meet the requirements of the technological exhaust. At the same time, the technological process often produces A large amount of heat requires a large cooling load, and the fresh air mainly constitutes the humidity load of the air conditioner in summer. Due to the strict temperature and humidity required by the process, the air supply volume is generally required to be large, and the temperature difference of the air supply is small, which makes th...

AI Technical Summary

Problems solved by technology

Conventional temperature and humidity air conditioners with precise adjustment function generally mix return air and fresh air and pass all the air through various functional sections, including surface cooling, heating, humidification, dehumidification, reheating and other functional sections, so that the fan can Large energy consumption, cold and heat offset, dehumidification and humidification offset, resulting in cooling, heating, dehumidification, humidification energy consumption is large, and at the same time the inertia of adjustment is large, and the adjustment effect is not necessarily good

[0004] In recent years, there are also control systems that use independent temperature and humidity, that is, use fresh air to adjust humidity, mixed air to adjust temperature, and at the same time use high-temperature cold water to cool down, low-temperature cold water or other methods such as runners, solution dehumidification to dehumidify, such a method , which solves the problems of independent temperature and humidity adjustment and reheating caused by overcooling of the wall, but does not solve the problem of precise humidity adjustment. If precise adjustment of humidity is required, fresh air may still cause problems such as excessive dehumidification and then rehumidification. In addition, Accurate adjustment of humidity requires the ability to dehumidify the fresh air at a deeper level, so as to have a certain room for adjustment. This requires chilled water with a lower temperature than ordinary ones or other dehumidification methods such as rotary wheels, which leads to complex fresh air treatment and increased energy consumption. Wait

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