Air conditioning system
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Solution Overview
Problem
Existing air conditioning systems face challenges in simultaneously maintaining comfortable room temperature and relative humidity levels when using both air conditioners for sensible heat load and humidity controllers for latent heat load, as changes in room temperature affect relative humidity, making it difficult to control both parameters effectively.
Innovation Solution
An air conditioning system that includes a humidity controller for processing latent heat and an air conditioner for processing sensible heat, with a control system that adjusts capacities based on target temperature and relative humidity settings, using an arithmetic section to calculate target absolute humidity and adjust humidity controller capacity to maintain desired conditions, allowing simultaneous temperature and humidity control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the capacity of the humidity controller is controlled on the basis of the relative humidity of the room at that point in time, then the relative humidity control responds quickly, but it becomes difficult to maintain immediately both the room temperature and the relative humidity within comfortable ranges
Solution Approach 1:
The system performs preliminary calculation of target absolute humidity based on the target temperature and target relative humidity before controlling the humidity controller. The arithmetic section calculates what the absolute humidity should be to achieve the desired relative humidity at the target temperature, allowing the system to proactively adjust rather than reactively respond to current conditions
Solution Approach 2:
The patent introduces absolute humidity as an intermediary parameter between temperature control and relative humidity control. Instead of directly controlling relative humidity based on current conditions, the system uses absolute humidity as a mediator that connects the target temperature setting with the target relative humidity setting, enabling coordinated control of both parameters
2Adaptability or versatility
If both air conditioner and humidity controller operate simultaneously in the same room, then both sensible heat load and latent heat load can be processed, but the room temperature changes with air conditioner operation causing relative humidity to fluctuate
Solution Approach 1:
The system implements feedback control where the arithmetic section continuously calculates the target absolute humidity based on the target temperature and target relative humidity settings. The humidity controller receives feedback about the current state and adjusts its capacity to minimize the difference between current and target absolute humidity, maintaining stable room conditions despite air conditioner operation
Solution Approach 2:
The patent applies dynamic control by continuously adjusting the humidity controller capacity based on real-time calculations. The system dynamically determines the appropriate humidity controller capacity to achieve the target absolute humidity, allowing adaptive response to changing room conditions while maintaining overall stability
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
The system effectively maintains room temperature and relative humidity at comfortable levels by adjusting the air conditioner and humidity controller capacities, ensuring immediate convergence to target settings, thus enhancing comfort and simplifying configuration.
Implementation Method 1
an adsorption heat exchanger supporting an adsorbing agent which performs adsorption of moisture
Implementation Method 2
a refrigerant circulates in a refrigerating circuit to perform a cycle of steam compression and refrigeration
Implementation Method 3
air refrigerated in the room heat exchanger, which serves as an evaporator, is supplied to the room
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
In an input section (30), a set temperature Ts which becomes a control target temperature of a humidity controller (10), and a set relative humidity Rs which becomes a control target humidity of the humidity controller (10) are set. An air conditioning control section (42) adjusts the temperature adjusting capacity of the humidity controller (10) such that the room temperature may come very close to the set temperature Ts. Further, an arithmetic section (33) calculates, as the target absolute humidity As, the absolute humidity which becomes the relative humidity set value Rs at the set temperature Ts. A humidity adjustment section (41) adjusts the humidity adjusting capacity of the humidity controller (10) such that the absolute humidity of the room may come very close to the target absolute humidity As.