Fan coil unit adopting double-working-condition coil and control method of fan coil unit

By adopting duplex coil structure and controller adjustment, the problem of the fan coil unit being too low for low air supply and humidity cannot be adjusted when supplying water in low temperature cold water is provided, and the dual adjustment of air supply temperature and humidity is achieved, reducing the energy consumption of the air conditioning water transportation and distribution system.

CN120466829APending Publication Date: 2025-08-12BEIJING SHIDAI JINGTONG TECH SERVICE CO LTD
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Patent Information

Application Number
CN202311862255.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-12-29
Publication Date
2025-08-12

AI Technical Summary

Technical Problem

When existing fan coil units use low-temperature cold water supply, the air supply temperature is too low, resulting in indoor condensation and fan coil units' own condensation, and the air supply temperature and humidity cannot be adjusted at the same time.

Method used

The duplex coil structure is adopted, including a dual-zoning coil and a valve assembly. Through the adjustment of the valve assembly, the first heat exchange zone of the dual-zoning coil is realized in a wet condition and the second heat exchange zone is operated in a dry condition. The controller automatically adjusts the air conditioner hot and cold water flow rate and fan air volume to achieve dual adjustment of air supply temperature and humidity.

Benefits of technology

It realizes dual adjustment of air supply temperature and humidity under low-temperature cold water supply conditions, avoids indoor condensation, reduces energy consumption of air conditioning water transportation and distribution systems, and supports multiple operating modes.

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Abstract

The invention discloses a fan coil unit adopting a double-working-condition coil and a control method of the fan coil unit, and relates to the technical field of air conditioning, and the fan coil unit comprises the double-working-condition coil, a fan, a water condensing disc and a box body. The double-working-condition coil pipe is composed of a double-partition coil pipe and a valve assembly, the double-partition coil pipe is provided with a first heat exchange area and a second heat exchange area, and air conditioner cold and hot water flowing through the first heat exchange area of the double-partition coil pipe can completely, partially or not flow through the second heat exchange area of the double-partition coil pipe through adjustment of the valve assembly. The first heat exchange area of the double-partition coil pipe operates under the wet working condition, and the second heat exchange area operates under the dry working condition during cooling. After the fan runs, indoor return air enters the box body through a return air inlet formed in the box body, is cooled or heated by the first heat exchange area and the second heat exchange area of the double-partition coil pipe and then is sent out through an air supply outlet formed in the box body. The air supply temperature and humidity are adjusted, air supply dewing is prevented, low-temperature cold water can be adopted for cooling, and the energy consumption of an air conditioner water transmission and distribution system is greatly reduced.
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