Air conditioning system
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Solution Overview
Problem
Existing air conditioning systems face inefficiencies and comfort issues due to inappropriate setting of target water temperatures, leading to either excessive or insufficient heating or cooling, especially during seasonal changes.
Innovation Solution
An air conditioning system that measures indoor and outdoor temperatures to determine a target water temperature, adjusting the temperature difference between the indoor and outdoor environments to optimize the water temperature supplied, thereby ensuring high operational efficiency without compromising user comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the heat source device is stopped when the indoor temperature becomes a set value, or water supply to the indoor heat exchanger is stopped by controlling a three-way valve, then the operational efficiency is improved, but the user's comfort is reduced due to intermittent heating or cooling operation
Solution Approach 1:
The patent applies dynamics by making the water supply temperature variable rather than fixed. The target water temperature is dynamically adjusted based on the outdoor temperature and the difference between set temperature and actual indoor temperature. This allows the system to maintain continuous operation with varying temperatures, preventing intermittent on/off cycling while still improving operational efficiency.
Solution Approach 2:
The patent changes the parameter of water supply temperature based on outdoor temperature conditions and indoor temperature deviation. By adjusting the target water temperature according to these parameters, the system avoids fixed temperature control that leads to intermittent operation, thereby maintaining both comfort and efficiency.
2Device complexity
If a fixed target water temperature is set by the installation contractor according to anticipated outdoor temperature, then the device complexity is reduced, but the operational efficiency decreases when the target temperature is inappropriate for the actual air conditioning load
Solution Approach 1:
The patent implements feedback control by continuously monitoring the actual indoor temperature and comparing it with the set temperature. The difference between these temperatures, along with outdoor temperature data, is used to adjust the target water temperature in real-time. This feedback mechanism ensures the system adapts to actual conditions without requiring complex manual configuration.
Solution Approach 2:
The system performs self-adjustment of the target water temperature based on measured temperature differences and outdoor conditions. Rather than requiring manual reconfiguration by installation contractors, the system automatically determines appropriate temperatures based on actual operating conditions, improving efficiency without adding significant complexity.
3Device complexity
If the target water temperature is set only based on the difference between set temperature and indoor temperature, then the device complexity is reduced, but the manufacturing precision of temperature control deteriorates, causing indoor temperature to become too high or too low for the set temperature
Solution Approach 1:
The patent makes the target water temperature dynamic by incorporating outdoor temperature as an additional variable. The target temperature is determined based on both the indoor temperature difference and outdoor temperature conditions, allowing the system to adapt to seasonal changes and varying load conditions, thereby improving temperature control precision.
Solution Approach 2:
The patent adds another dimension to the control by incorporating outdoor temperature into the target water temperature determination. Instead of relying solely on indoor temperature deviation, the system considers outdoor temperature as an additional factor, creating a two-dimensional control approach that improves precision without significantly increasing complexity.
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 sets a suitable target water temperature based on indoor and outdoor temperature differences, enhancing operational efficiency and maintaining user comfort by adjusting the temperature supply accordingly.
Implementation Method 1
a water circuit 10 in which water flows; an intermediate heat exchanger 9 connected to the refrigerant circuit 4, for heating or cooling the water circulating through the water circuit 10 by heat exchange with the refrigerant
Implementation Method 2
an indoor heat exchanger 12 for performing heat exchange between the fluid heated or cooled by the heat source device and an indoor air
Data Source
AI summary
An air conditioning system, a set temperature determining device determines a target temperature of water to be supplied to an indoor heat exchanger, based on [“target outflow temperature”=“current outflow temperature”+((“inlet and outlet temperature difference”/“indoor and outdoor temperature difference”)דset temperature difference”)]. The indoor and outdoor temperature difference is a difference between an indoor temperature and an outdoor temperature, the inlet and outlet temperature difference is a difference between temperatures of water at the inlet side and the outlet side of an intermediate heat exchanger, and the set temperature difference is a difference between an indoor temperature and a set temperature. A control device controls an outdoor unit in response to the target temperature determined by the set temperature determining device.