Blower and refrigerator
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Solution Overview
Problem
The existing blower design for refrigerators obstructs the flow of cold air from the first case flow path to the second case flow path due to the placement of a fixer, resulting in inadequate distribution of cold air to storage compartments with different ventilation resistances.
Innovation Solution
A blower design with a support member that positions the fixer outside the distribution region, allowing unobstructed flow from the first case flow path to the second case flow path, and strategically placed introduction ports to ensure appropriate air distribution without significantly reducing the air amount or static pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the fixer is installed inside the first case flow path to support the impeller, then the impeller can be securely fixed to the casing, but the flow of cold air in the first case flow path is obstructed, causing inadequate distribution of cold air to the second case flow path
Solution Approach 1:
The fixer is repositioned from the first case flow path to the second case flow path, changing its spatial location to a different dimension (flow path). This allows the fixer to maintain its support function while eliminating the obstruction problem in the first case flow path, enabling proper cold air distribution to both flow paths
2Strength
If the fixer protrudes outward from the impeller blowing surface to secure the impeller, then the impeller can be firmly attached to the casing, but the fixer obstructs the cold air flow and reduces the amount of cold air distributed
Solution Approach 1:
The fixer is extracted from the first case flow path and relocated to the second case flow path. This separation removes the harmful obstruction effect from the first case flow path while maintaining the necessary attachment function in the second case flow path, thereby preserving cold air quantity in the first flow path
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 design enables efficient distribution of cold air to both high and low ventilation resistance paths, ensuring appropriate cooling for each storage compartment while maintaining high air and static pressure in the first case flow path.
Implementation Method 1
an impeller rotatably installed in the casing... an impeller includes a disk-shaped base plate rotatably supported by the support member
Data Source
AI summary
A blower configured to circulate cold air inside a body of a refrigerator. The blower includes a casing, an impeller accommodated in the casing, and a support member configured to support the impeller against the casing. The impeller includes a disk-shaped base plate rotatably supported by the support member. The casing includes an inner circumferential surface extending so as to gradually move away from an outer circumference of the base plate toward a rotational direction of the impeller at a predetermined position around the outer circumference of the base plate, and a first case flow path between the inner circumferential surface and the outer circumference. An introduction port configured to introduce the cold air to a second case flow path branched from the first case flow path is formed on the inner circumferential surface of the casing.