Air-conditioning system, air-conditioning controller, air conditioner, and air-conditioning control method
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Solution Overview
Problem
Existing air conditioning systems face inefficiencies when preheating or precooling a space for use the next morning, particularly in offices, as they often operate during low outside temperatures, leading to increased energy consumption.
Innovation Solution
The air conditioning system employs a controller that operates in a first mode, where the air conditioner performs preheating or precooling at set times, and then stops when the target temperature is exceeded or dropped, allowing natural temperature adjustments to reach the desired temperature efficiently, thereby reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the air conditioner operates to reach the target temperature exactly at the time when the room is used next, then the indoor temperature reaches the target temperature, but the air conditioner needs to operate during low outside temperature periods which causes poor energy efficiency
Solution Approach 1:
The air conditioner performs preheating or precooling operations in advance before the room is needed, stopping early when the temperature reaches a predetermined value. The remaining temperature adjustment is left to natural temperature changes, thereby achieving the target temperature at the appropriate time while improving energy efficiency by avoiding operation during inefficient low outside temperature periods.
2Stability of the object's composition
If the air conditioner operates longer to ensure target temperature is reached, then the temperature stability is improved, but the energy consumption increases
Solution Approach 1:
The system utilizes natural temperature changes (heating from indoor equipment, occupants, or passive solar gain) to complete the temperature adjustment after the air conditioner stops early. This self-service approach maintains temperature stability while reducing energy consumption by avoiding extended air conditioner operation.
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 approach allows for more energy-efficient operation by adjusting the target space temperature closer to the desired temperature before the air conditioner is turned off, enabling natural temperature stabilization and reducing energy usage.
Implementation Method 1
the air conditioner performs a preheating operation or a precooling operation... to increase or decrease the temperature of the target space
Implementation Method 2
the temperature of the target space can be brought close to the target temperature by a natural temperature decrease or temperature rise
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
An air conditioning system includes an air conditioner (11) and an air conditioning controller (50, 55), in which the air conditioning controller has, as a control mode, a first mode in which the air conditioner performs a preheating operation or a precooling operation at or after a first time (te) set in advance and at or before a second time (ts) at which the target space is used next, the first mode is a control mode of operating the air conditioner and stopping the air conditioner when the temperature of the target space increases to a preheating temperature (TH) higher than a target temperature (TM) of the target space at the second time (ts) or when the temperature of the target space decreases to a precooling temperature (TL) lower than the target temperature (TM), the preheating temperature (TH) is set such that the temperature of the target space becomes the target temperature (TM) or higher than the target temperature (TM) at a point of the second time (ts), and the precooling temperature (TL) is set such that the temperature of the target space becomes the target temperature (TM) or lower than the target temperature (TM) at the point of the second time (ts).