A multi-zone heating / cooling system, control method and controller

By using multi-zone heating/cooling systems and predictive control technology, the response lag and condensation risks of refrigerant direct radiation heating/cooling systems have been resolved, achieving efficient and stable multi-zone regulation and energy consumption reduction.

CN121804116BActive Publication Date: 2026-07-24QINGDAO UNIV OF TECH
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO UNIV OF TECH
Filing Date
2026-02-12
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing refrigerant direct radiant heating/cooling systems have problems with response characteristics and multi-zone control, leading to decreased energy efficiency and condensation risks, and lack of adaptive control schemes.

Method used

A multi-zone heating/cooling system is adopted, which utilizes refrigerant coil branches and zone electronic expansion valves, combined with a sensor system, a central controller and zone terminal controllers, and predictive control through a radiant heat transfer model to achieve zone regulation and load matching, avoiding the response lag and oscillation of traditional control strategies.

Benefits of technology

It improves the system's operating efficiency under partial load, reduces energy consumption, enhances comfort and system safety, and ensures fast, smooth response and stability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN121804116B_ABST
    Figure CN121804116B_ABST
Patent Text Reader

Abstract

The application provides a multi-zone heating / cooling system, a control method and a controller, which comprises an outdoor unit, an indoor heat exchange unit, the outdoor unit comprises a compressor, a four-way reversing valve, an outdoor heat exchanger and a gas-liquid separator, the indoor heat exchange unit is composed of multiple groups of refrigerant coil branches which are embedded in radiation plate structures of each zone and each branch is provided with an electronic expansion valve for fine adjustment of refrigerant flow, the compressor, the gas-liquid separator and the four-way reversing valve are connected in series, and the four-way reversing valve is also connected in series with the outdoor heat exchanger, the refrigerant coil branch and the electronic expansion valve; the control method comprises data acquisition and working condition judgment, load rate calculation and compressor frequency matching based on a control target, a radiation plate prediction model and a limiting condition, and collaborative control in the case of load variation; the problems of matching of characteristics of the outdoor unit and indoor terminal and multi-zone energy distribution of the existing direct refrigerant radiation heating / cooling system are solved.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Multi-connected dry-type capillary tube radiation heat pump system and refrigerant flow control method thereof

    CN115435506A