Suction device for a hood, equipped with an electric connector
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Solution Overview
Problem
Existing suction devices for hoods in household environments suffer from poor fluid-dynamic performance due to the arrangement of electric elements like capacitors and connectors, which disrupt air flow and are difficult to assemble and manufacture safely.
Innovation Solution
The suction device features a volute composed of two semi-shells housing the electric motor and impeller, with capacitors and connectors placed in dedicated compartments external to the impeller, preventing airflow disruption and allowing for safer and more rational assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If electric elements (capacitors and connectors) are housed inside the volute under the electric motor, then the device structure is compact, but the fluid-dynamic performance deteriorates due to air flow disruption
Solution Approach 1:
The volute is segmented into two separate semi-shells (first and second semi-shells) that are joined together. This segmentation allows dedicated compartments to be formed in each semi-shell for housing electric elements, separating them from the air flow path while maintaining structural integrity and compactness of the overall volute assembly.
Solution Approach 2:
Different regions of the volute are assigned different functions: the main volute body optimizes air flow for fluid-dynamic performance, while dedicated compartments within the semi-shells provide localized housing for electric elements. This local differentiation allows each region to perform its specific function optimally without compromising the other.
2Device complexity
If electric elements are arranged inside the volute, then the device structure is integrated, but assembly and manufacturing difficulty increases
Solution Approach 1:
The volute is divided into two separable semi-shells that can be manufactured independently and then joined. This segmentation simplifies the manufacturing process by allowing each semi-shell to be produced separately with its dedicated compartments, making assembly more straightforward compared to integrating all features into a single complex piece.
Solution Approach 2:
The dedicated compartments for electric elements are pre-formed during the manufacturing of each semi-shell before assembly. This preliminary action ensures proper positioning and integration of electric elements is built into the structure itself, eliminating the need for complex post-assembly adjustments or modifications.
3Device complexity
If electric elements are placed inside the volute, then the device structure is unified, but safety deteriorates due to user contact risk
Solution Approach 1:
The volute is segmented into two semi-shells with dedicated compartments that provide enclosed housing for electric elements. This segmentation creates natural barriers and isolated chambers that protect users from direct contact with electric components while maintaining the unified appearance and structure of the complete volute assembly.
Solution Approach 2:
The dedicated compartments formed in the semi-shells act as intermediary structures between the electric elements and the external environment. These compartments provide physical isolation and protection, serving as a safety barrier that prevents user contact with electric components while allowing the volute to function as a unified structure.
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 arrangement enhances fluid-dynamic performance, simplifies assembly, and improves safety by isolating electric components from airflow and user contact, resulting in a more efficient and user-friendly suction device.
Implementation Method 1
a capacitor (306) and a connector (307), electrically connected to said capacitor (306) for supplying power to said motor (302)
Implementation Method 2
an electric motor (302) that drives said impeller (303)
Implementation Method 3
an impeller (303), an electric motor (302) that drives said impeller (303)
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The present invention relates to a suction device (103) for a hood, comprising an impeller (303), an electric motor (302) that drives said impeller (303), a volute (201) that houses inside the electric motor (302) and the impeller (303), a capacitor (306), and a connector (307) electrically connected to the capacitor (306) for supplying power to the electric motor (302); the volute (201) comprises a first semi-shell (201a) and a second semi-shell (201b) joined with each other so as to constitute the structure of the volute (201) surrounding the impeller (303); the capacitor (306) is housed in a first compartment (308) formed in the first semi-shell (201a), and the connector (307) is housed in a second compartment (309) formed in the second semi-shell (201b); the first compartment (308) and the second compartment (309) are adjacent to each other in the volute (201). The present invention further relates to an associated range hood.