Air management system for a heating, ventilation, and air-conditioning system
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Solution Overview
Problem
Traditional HVAC systems with single motor-driven blowers suffer from increased power consumption, limited part-load operation options, space restrictions, non-uniform airflow, and cost inefficiencies due to friction losses and belt-pulley interfaces, leading to reduced system efficiency.
Innovation Solution
The implementation of two independently operable and optimally positioned direct-drive blowers within the HVAC system, allowing for reduced power consumption and improved airflow uniformity over the indoor heat exchanger, eliminating the need for a belt-pulley interface and minimizing cross-talk between blowers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single motor drives multiple blowers via belt or direct-drive configuration, then device complexity is reduced, but power consumption increases and airflow uniformity deteriorates
Solution Approach 1:
The patent divides the single motor-driven blower system into multiple independent direct-drive blowers, each with its own motor. This segmentation allows each blower to operate independently without friction losses from belt-pulley interfaces, reducing overall power consumption while maintaining simple device architecture through modular design.
Solution Approach 2:
The patent replaces the mechanical belt-pulley transmission system with direct-drive motor configurations. This substitution eliminates friction losses inherent in belt-driven systems, directly reducing power consumption while simplifying the mechanical complexity of each blower unit.
2Device complexity
If a single motor drives multiple blowers, then device complexity is reduced, but airflow uniformity over heat exchanger deteriorates
Solution Approach 1:
By segmenting the blower system into multiple independent direct-drive units, each blower can be precisely positioned and controlled to deliver uniform airflow distribution across the heat exchanger surface, overcoming the airflow non-uniformity problem of single motor-driven configurations.
Solution Approach 2:
Each direct-drive blower is independently positioned and controlled to optimize local airflow characteristics over specific sections of the heat exchanger, ensuring uniform airflow distribution across the entire heat exchange surface.
3Volume of moving object
If blowers are positioned close together to save space, then space restriction is reduced, but airflow blockage and cross-talk increase
Solution Approach 1:
The patent uses multiple independent direct-drive blowers that can be positioned in optimized configurations, allowing compact space utilization while maintaining sufficient airflow clearance between units to prevent blockage and cross-talk interference.
Solution Approach 2:
The blower arrangement utilizes three-dimensional spatial optimization, positioning multiple blowers at different locations and orientations to achieve compact footprint while maintaining adequate airflow pathways, effectively resolving the conflict between space utilization and airflow blockage prevention.
4Device complexity
If belt-pulley interface is used to drive blowers, then device complexity is reduced, but friction losses and power consumption increase
Solution Approach 1:
The patent replaces the belt-pulley mechanical transmission system with direct-drive motor configurations, eliminating friction losses at the belt-pulley interface while maintaining simple drive mechanisms through direct motor-to-blower coupling.
Solution Approach 2:
The patent extracts and removes the belt-pulley interface from the drive system, eliminating the source of friction losses. The simplified direct-drive configuration achieves energy efficiency by eliminating this intermediate mechanical transmission component.
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 configuration reduces power consumption, enhances airflow uniformity, and increases the efficiency of the HVAC system by allowing operation of only one blower during smaller loads and optimizing blower positioning to reduce interference and airflow blockages.
Implementation Method 1
a fluid transitioning from gas to liquid releases heat
Implementation Method 2
a fluid transitioning from gas to liquid releases heat
Implementation Method 3
a fluid transitioning from liquid to gas absorbs heat
Implementation Method 4
a fluid transitioning from liquid to gas absorbs heat
Implementation Method 5
two or more blowers positioned within an indoor unit that flow air over an indoor heat exchanger
Data Source
AI summary
A heating, ventilation, and air-conditioning (“HVAC”) system. The HVAC system may include a refrigeration circuit and a blower system. The refrigeration circuit may include a compressor, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger. The blower system may include a first direct-drive blower and a second direct-drive blower. The first direct-drive blower may flow air over the indoor heat exchanger. The second direct-drive blower may flow air over the indoor heat exchanger and the second direct-drive blower may operable and positionable relative to the indoor heat exchanger independently from the first direct-drive blower.