Air conditioner outdoor unit
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Solution Overview
Problem
Conventional top-flow type air conditioner outdoor units face a tradeoff between improving motor efficiency and maintaining heat exchange efficiency, as larger fan motors block air passages and reduce wind flow, necessitating smaller motor diameters that limit efficiency gains.
Innovation Solution
The fan motor is designed with a larger outer diameter than the fan boss, positioned closer to the center, and configured to minimize iron loss while maximizing copper loss, ensuring efficient wind passage without reducing heat exchange efficiency, by setting the outer diameter within specific dimensional constraints relative to the casing and heat exchanger dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the outer diameter of the fan motor is increased to improve motor efficiency, then motor efficiency is improved, but the air passage is blocked and heat exchange amount decreases
Solution Approach 1:
The patent applies dimensional change by transitioning from a conventional side-by-side arrangement to a stacked configuration where the fan motor is positioned above the fan boss in the vertical direction. This allows the motor to have a larger outer diameter without horizontally blocking the air passage, as the motor occupies the vertical space above the fan rather than the horizontal air flow path. The air passage remains unobstructed while the motor achieves improved efficiency through increased diameter.
Solution Approach 2:
The patent employs a fan boss structure that replicates the functional characteristics of a traditional motor housing while being optimized for the stacked configuration. The fan boss serves as an intermediate structure that supports the motor above it while maintaining the necessary air flow characteristics, effectively copying the protective and structural functions of conventional motor mounts without the space constraints.
2Productivity
If the outer diameter of the fan motor is made smaller to avoid blocking air passage, then air flow is maintained, but motor efficiency cannot be improved
Solution Approach 1:
The patent resolves this contradiction by moving the motor to the vertical dimension above the fan boss, decoupling the motor size from the horizontal air passage constraints. This spatial reconfiguration allows the motor diameter to be optimized for efficiency without compromising air flow, as the motor no longer occupies the horizontal space through which air must pass.
3Productivity
If the fan motor is positioned closer to the center to reduce air passage blockage, then air flow is improved, but the motor cannot achieve optimal efficiency
Solution Approach 1:
The patent applies vertical stacking to separate the motor positioning from the air passage geometry. By placing the motor above the fan boss in the vertical direction, the motor can be optimally positioned for efficiency without being constrained by horizontal distance from the center. The air passage geometry remains optimized for flow while the motor achieves its optimal efficiency position independently in the vertical dimension.
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 enhances motor efficiency by reducing iron loss while maintaining heat exchange efficiency, allowing for improved energy consumption and a more environmentally friendly air conditioner outdoor unit.
Implementation Method 1
a fan motor provided on a lower side of the fan
Implementation Method 2
a refrigerant is circulated into the heat exchanger, to perform heat exchange between ambient air of the heat exchanger and the refrigerant
Implementation Method 3
When the fan is rotated, air is taken in to the inside of the outdoor unit from the sides of the outdoor unit, and a wind caused at this time is introduced into the heat exchanger, thereby facilitating heat exchange
Data Source
AI summary
To provide an air conditioner outdoor unit including a casing having an air inlet on a side surface and an air outlet on an upper surface, a heat exchanger that covers the air inlet and is provided inside the casing, a fan that sucks in air from the air inlet and discharges air from the air outlet, and a fan motor provided on a lower side of the fan. The fan motor is set such that an outer diameter D1 thereof is larger than an outer diameter D2 of a fan boss, and an outer periphery thereof is positioned on a center side of the fan motor than a straight line c passing an upper side of a center (for example, a predetermined position a) of the heat exchanger and a side (for example, a predetermined position b) of the fan boss.