Refrigerator Cable-Bushing Box for Foam-Tight Machine Chambers
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Solution Overview
Problem
Existing household refrigeration appliances face issues with reliably sealed line routing into the machine room, particularly due to the introduction of thermally insulating foam material during production, which can compromise the tightness and integrity of the chamber.
Innovation Solution
A household refrigeration appliance design featuring a line bushing box with a receptacle and integrally connected lid, positioned outside the machine room, ensures reliable closure and tightness even when thermally insulating material is introduced, using a film hinge for smooth operation and a one-piece design with a circumferential rib and latching element for enhanced positional fixation and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a chamber with slotted walls is used for line routing, then lines can be routed into the machine room, but the tightness and sealing are compromised when foam material is introduced during production
Solution Approach 1:
The boundary wall is segmented into modular components: a receptacle for receiving lines, a detachable lid for closing, and a box structure. This segmentation allows the lid to be separately closed and sealed, preventing foam material from compromising the seal while maintaining ease of line routing during manufacturing.
Solution Approach 2:
The box acts as an intermediary structure between the line routing function and the sealing requirement. It provides a dedicated receptacle and lid assembly that mediates between the need to route lines and the need to maintain tightness, isolating the sealing interface from the foam material introduction process.
2Loss of energy
If foam material is introduced into the intermediate space during production, then thermal insulation is achieved, but the chamber tightness and sealing are compromised
Solution Approach 1:
The lid is extracted as a separate, detachable component from the receptacle, allowing it to be closed and sealed independently before foam material introduction. This extraction enables the sealing function to be isolated from the foam filling process, maintaining chamber tightness while achieving thermal insulation.
Solution Approach 2:
The lid is closed and the sealing is established as a preliminary action before the foam material is introduced into the intermediate space. This preliminary sealing action ensures that the chamber tightness is maintained throughout the foam introduction process, preventing foam from compromising the seal.
3Ease of manufacture
If the box is positioned inside the machine room, then line routing is achieved, but the usable volume of the machine room is reduced
Solution Approach 1:
The box is repositioned from inside the machine room to the boundary wall interface, utilizing the wall thickness dimension. The receptacle extends into the machine room for line routing while the main box structure is positioned at the boundary, effectively using the wall space to avoid reducing the machine room's usable volume.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a domestic refrigeration appliance (1) having a housing (2), in which is arranged an inner container which bounds an interior (3, 4) for accommodating foods, and having a machinery chamber (12), which is separated from the interior (3, 4) and in which components (7 to 11) of a refrigeration circuit of the domestic refrigeration appliance (1) are arranged, wherein the machinery chamber (12) has a boundary wall (13), on which is arranged a cable-bushing box (17) for leading at least one cable (18a, 18b, 18c) through into the machinery chamber (12) from outside the machinery chamber (12), and the box (17) has an accommodating receptacle (19) and a cover (20) for closing the accommodating receptacle (19), and the cover (20) is connected in one piece to the accommodating receptacle (19).