Hot Water Heating Control for Stable Floor Temperature
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Solution Overview
Problem
In hot water heating systems, the temperature under floor heating panels can drop quickly, leading to discomfort as the temperature detected by the thermostat may not accurately represent the temperature felt by users, resulting in cold feet.
Innovation Solution
A hot water heating apparatus with an indoor air temperature detector and a second control section that overrides the primary control to turn the compressor on if the temperature of the hot water falling through the radiator drops below a predetermined level, ensuring continuous heating even when the primary control has switched it off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the compressor is controlled to switch off when the detected temperature reaches the set temperature, then energy consumption is reduced, but the temperature under the user's feet decreases quickly causing discomfort
Solution Approach 1:
The system performs preliminary action by monitoring the temperature difference between indoor air and floor surface in advance. When the floor temperature is detected to be lower than the air temperature, the compressor is preemptively restarted before the user actually feels cold, preventing the harmful effect rather than reacting to it after occurrence.
Solution Approach 2:
The system introduces feedback by continuously monitoring both indoor air temperature and floor surface temperature, comparing these values to determine the appropriate compressor operation state. This dual-temperature feedback mechanism allows the system to adjust compressor operation based on actual thermal conditions rather than relying solely on air temperature thresholds.
2Productivity
If the compressor operation is controlled based on indoor air temperature detection, then the overall room heating is efficient, but the floor heating temperature cannot be maintained comfortably
Solution Approach 1:
The system applies local quality by differentiating control strategies for different locations within the heating system. The indoor air temperature controls overall compressor operation for general heating efficiency, while the floor surface temperature provides local feedback specifically for maintaining comfortable foot temperature, allowing zone-specific optimization.
Solution Approach 2:
The system implements dynamics by making the compressor operation state flexible and adaptive rather than fixed. The compressor can operate in three states (on, off, or restart based on floor temperature), dynamically adjusting to the thermal relationship between air and floor temperatures to balance efficiency and comfort requirements.
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 solution maintains comfortable floor heating by preventing rapid temperature drops under the user's feet, ensuring consistent warmth and comfort.
Implementation Method 1
Floor heating panels laid on floor surfaces are surrounded by a number of heat dissipation elements such as floor materials and underfloor spaces
Data Source
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AI summary
A hot water heating apparatus supplies hot water obtained from an operation of a heat-pump refrigeration cycle to a heat radiator for room heating. Further, the hot water heating apparatus controls an operation of a compressor of the heat-pump refrigeration cycle by comparing a detected temperature and a set temperature of an operating unit with each other. Still further, the hot water heating apparatus sets the operation of the compressor, when the operation is in an off state under the above-described control and if a temperature of the hot water after passing through the heat radiator falls below a predetermined temperature, to an on state regardless of the above-described control.