Radiant air conditioning system for controlling comfortable and healthy indoor environment based on infrared sensing technology
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Solution Overview
Problem
Current radiant air conditioning systems fail to accurately control human body surface temperature and comfort level due to insufficient radiant heat exchange and mutual influence of carbon dioxide concentration and humidity control, leading to inadequate indoor health levels.
Innovation Solution
A radiant air conditioning system incorporating infrared sensing technology, air source heat pumps, dehumidified fan coils, and radiant floors and ceilings for direct heat exchange and humidity control, allowing for independent management of humidity and air freshness to accurately regulate human body surface temperature and outdoor air flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radiant cooling terminal surface area is increased to enhance radiant heat exchange, then human body surface temperature control improves, but device complexity and installation cost increase
Solution Approach 1:
The system divides the cooling function into two independent parts: radiant cooling terminals (floor/ceiling) for surface temperature control and dehumidification air supply for humidity control. This segmentation allows each component to be optimized independently, achieving reliable temperature control without requiring excessive radiant terminal area.
Solution Approach 2:
The patent introduces dehumidification air supply as an intermediary system that works in conjunction with the radiant cooling terminals. This mediator handles the humidity control function, allowing the radiant terminals to focus on temperature control with reduced surface area requirements.
2Reliability
If dedicated outdoor air system increases outdoor air flow rate to control carbon dioxide concentration, then indoor health level improves, but air humidity control deteriorates due to mutual influence with dehumidification
Solution Approach 1:
The system segments the control functions by dedicating the outdoor air system to carbon dioxide concentration control and introducing a separate dehumidification air supply system for humidity control. This eliminates the mutual influence between the two control functions, allowing precise control of both parameters independently.
Solution Approach 2:
The dehumidification air supply acts as an intermediary system that specifically addresses humidity control without interfering with the outdoor air system's carbon dioxide concentration control. This mediator enables precise humidity control while maintaining healthy air exchange levels.
3Power
If radiant cooling terminal surface temperature is increased to enhance radiant heat exchange, then heat exchange intensity improves, but comfort level deteriorates due to excessive cooling
Solution Approach 1:
The system segments the cooling load into radiant cooling (handling sensible heat) and dehumidification air supply (handling latent heat). This allows the radiant terminals to operate at moderate temperatures for comfort while still providing sufficient cooling through the combined system.
Solution Approach 2:
The patent changes the control parameter from radiant terminal surface temperature to a combination of radiant cooling capacity and dehumidification air supply. This parameter change allows the system to achieve high heat exchange intensity through coordinated operation rather than excessive terminal temperatures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system significantly enhances radiant heat exchange and accurately controls human body surface temperature and comfort, while ensuring healthy indoor air quality by decoupling humidity and air freshness control, thereby achieving a comfortable and healthy indoor environment.
Implementation Method 1
infrared sensor 17...based on infrared sensing technology
Implementation Method 2
radiant heat exchange between the radiant terminal surface and the human body surface
Implementation Method 3
air source heat pump outdoor unit 1, air source heat pump indoor plate evaporator 2, air source heat pump indoor finned evaporator 6 and the air source heat pump indoor finned condenser 7
Data Source
AI summary
A radiant air conditioning system for controlling comfortable and healthy indoor environment based on infrared sensing technology is disclosed, which comprises air source heat pump outdoor unit, plate evaporator, circulating water pump, etc. Accurate control of air humidity by installing an indoor dehumidification terminal can reduce the surface temperature of radiant cooling terminal and increase the installed area, which will significantly improve the radiant heat exchange between the terminal surface and the human body surface. Infrared sensor technology, which is adopted to obtain the number of indoor occupants and the required outdoor air flow rate, is integrated with a decoupling control of the indoor humidity and air freshness for the accurate control of outdoor air flow rate, and then the supply outdoor air temperature and humidity are regulated for the accurate control of indoor health level.