Air-conditioning system
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Solution Overview
Problem
Conventional air-conditioning systems have a low coefficient of performance (COP) when the outside air processing device and air-conditioning device operate at low load, leading to inefficient energy usage and potential user discomfort due to frequent start-stop cycles of the chiller and accessory machines.
Innovation Solution
The system includes an outside air processing device and an air-conditioning device that can adjust temperature and humidity, with a controller that stops operation of either device if the load factor falls below a predetermined limit and the temperature/humidity state of the target space is within a predetermined range, allowing for efficient energy conservation and comfort maintenance by redistributing air conditioning capacity between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the outside air processing device and air-conditioning device operate independently at low load, then each device can maintain basic air conditioning function, but the coefficient of performance (COP) becomes very low leading to inefficient energy usage
Solution Approach 1:
The patent combines the control of the outside air processing device and air-conditioning device into a unified control system. The controller coordinates both devices to work together rather than independently, optimizing their combined operation to maintain adequate COP even at low loads by intelligently distributing the air conditioning load between the two devices.
Solution Approach 2:
The patent implements dynamic load distribution between the outside air processing device and air-conditioning device based on real-time operating conditions. The controller continuously adjusts the operation modes and capacity allocation of both devices according to varying load requirements, ensuring optimal energy efficiency across different operating scenarios.
2Reliability
If the outside air processing device and air-conditioning device operate independently at low load, then each device can maintain basic air conditioning function, but frequent start-stop cycles occur causing user discomfort
Solution Approach 1:
The unified control system merges the operation coordination of both devices to prevent frequent start-stop cycles. By managing the combined capacity of the outside air processing device and air-conditioning device, the system maintains continuous operation or smooth transitions, avoiding the discomfort caused by frequent cycling.
Solution Approach 2:
The patent ensures continuous air conditioning service by coordinating both devices to maintain operation without frequent interruptions. The controller manages the load distribution to keep at least one device running continuously or to enable smooth transition between devices, eliminating the start-stop cycles that cause user discomfort.
3Use of energy by moving object
If the load is distributed between the outside air processing device and air-conditioning device using COPs and other factors, then power consumption is minimized, but the control complexity increases
Solution Approach 1:
The control system implements feedback mechanisms that monitor operating conditions, load factors, and performance parameters of both devices. Based on this feedback, the controller automatically adjusts the load distribution to optimize power consumption, managing the complexity through intelligent control algorithms that respond to real-time system states.
Data Source
AI summary
In an air-conditioning system including an outside air processing device and an air-conditioning device, an operation of either one of the outside air processing device or the air-conditioning device is stopped if a temperature/humidity state that is at least either the temperature or humidity of air in a target space is within a predetermined range and if the load factor of at least one of the outside air processing device or the air-conditioning device is below a predetermined lower limit.