Base-Mounted Heat Pump Water Heater Airflow Layout for Quiet Efficiency
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Solution Overview
Problem
Conventional heat pump water heaters face challenges in increasing reliability and thermal efficiency, reducing noise generation, and minimizing undesirable heat transfer to cooled air flow.
Innovation Solution
A specially designed endothermic base-mounted heat pump water heater with a refrigerant-based heat pump circuit, where the condenser coil is positioned at a higher elevation than the compressor, and the air intake is elevated to enhance heat transfer and noise reduction, with a secondary heating source like electric heating elements for temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the condenser coil is positioned at a higher elevation than the compressor, then heat exchange efficiency is enhanced and compressor reliability is improved, but device complexity increases
Solution Approach 1:
The patent positions the condenser coil at a higher elevation than the compressor, utilizing the vertical dimension to improve heat exchange efficiency and compressor reliability through gravity-assisted refrigerant flow and optimized thermal contact, while accepting increased structural complexity
2Object-generated harmful factors
If the air intake is elevated, then noise generation is reduced and heat transfer efficiency is enhanced, but device complexity increases
Solution Approach 1:
The patent elevates the air intake position to reduce noise generation by distancing it from ground-level disturbances and to enhance heat transfer efficiency through improved air flow characteristics, while accepting the resulting increase in device complexity
3Use of energy by moving object
If the heat pump circuit operates continuously, then thermal efficiency is improved, but undesirable heat transfer to cooled air flow increases
Solution Approach 1:
The patent extracts and isolates the cooled air flow path from the water heating function, directing it through separate channels that prevent undesirable heat transfer to the water tank, thereby maintaining thermal efficiency while eliminating energy loss to cooled air
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
Improves compressor reliability, enhances heat exchange efficiency, reduces noise, and minimizes heat transfer to cooled air, resulting in a more efficient and quieter operation.
Implementation Method 1
the condenser coil is positioned at a higher elevation than the compressor
Implementation Method 2
the air intake is elevated to enhance heat transfer
Implementation Method 3
a refrigerant-based heat pump circuit, where the condenser coil is positioned at a higher elevation than the compressor
Data Source
AI summary
An endothermic heat pump water heater has a water tank supported atop a hollow base, a heat pump circuit operable to provide primary heat to water in the tank, and an electric resistance heating element operable to provide secondary heat to the water. The heat pump circuit includes refrigerant tubing in which a compressor disposed within the base, a condenser in heat exchange external contact with the tank, a refrigerant expansion device, and an evaporator disposed within the base are connected in series. A vertical duct, external to the tank, has an inlet adjacent the upper tank end, and a fan is operative to sequentially flow air inwardly through the inlet, downwardly through the duct into the base, across the compressor, across the evaporator, and then outwardly from the base.