Outdoor unit of air conditioner
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Solution Overview
Problem
The upward blow type outdoor units for air conditioners face challenges in maintaining adequate distances between components due to height restrictions during delivery, leading to air current contact and performance issues.
Innovation Solution
Incorporating a height changing member between the fan guard and the bell mouth, allowing the fan guard to adjust its position relative to the blowing fan, enabling the outdoor unit to decrease in height for delivery and increase in height at the installation location, thus optimizing component distances and reducing air current contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the outdoor unit is designed with adequate distances between the outdoor heat exchanger and blowing fan, and between the blowing fan and fan guard, then air current contact is prevented and performance is improved, but the height of the outdoor unit increases beyond delivery restrictions
Solution Approach 1:
The bell mouth is designed with a movable structure that allows it to extend outward from the housing in the operational state, increasing the distance between the blowing fan and fan guard. During delivery, the bell mouth is retracted to minimize the overall height. This dynamic adjustment enables the unit to meet delivery height restrictions while maintaining adequate component spacing for optimal performance during operation.
Solution Approach 2:
Instead of increasing height vertically to prevent air current contact, the bell mouth is designed to extend horizontally outward from the housing. This dimensional change allows adequate spacing between components without increasing the vertical height that is constrained by delivery restrictions, effectively solving the contradiction by transitioning the problem from the vertical dimension to the horizontal dimension.
2Volume of moving object
If the packing size is reduced to meet freight elevator restrictions, then delivery becomes feasible, but the distance between components decreases causing air current contact
Solution Approach 1:
The bell mouth incorporates a movable extension mechanism that allows it to protrude outward from the housing during operation. This dynamic feature enables the packing size to be minimized for delivery while maintaining adequate component spacing during operation, effectively decoupling the delivery configuration from the operational configuration.
Solution Approach 2:
The bell mouth is designed with a pre-configured extension capability that is activated upon installation. The structure includes predetermined extension positions and guiding features that enable the bell mouth to be positioned at the optimal distance from the housing, preventing air current contact before the unit begins operation.
Data Source
AI summary
An outdoor unit of an air conditioner includes: a housing including a bottom surface, a side surface, and an upper surface; an outdoor heat exchanger arranged along the side surface of the housing; a blowing fan arranged on the upper surface of the housing; a bell mouth arranged around the blowing fan; a fan guard provided to cover an upper portion of the blowing fan; and a height changing member provided between the fan guard and the bell mouth and configured to change a height of the fan guard with respect to the blowing fan.