Ventilation system with controlled mechanical ventilation unit and electrical junction box
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current controlled mechanical ventilation (CMV) systems face difficulties in making electrical connections, especially in hard-to-reach locations like false ceilings, leading to potential installation errors and safety issues due to limited access and maneuverability.
Innovation Solution
An externally accessible electrical junction box with a prismatic configuration and snap-fit attachment allows for easy connection of mains wires to internal connection pins within the CMV unit, reducing errors and ensuring secure connections through quick connect connectors and retention means for both wire harnesses and corrugated tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the CMV unit is installed in a false ceiling or hard-to-reach location, then the ventilation system can be properly positioned for optimal air extraction, but the electrical connection process becomes difficult and error-prone due to limited access and maneuverability
Solution Approach 1:
The electrical connection system is divided into two separate parts: a junction box that remains external and accessible, and connection pins integrated into the CMV unit. This segmentation allows the electrical connection process to be separated from the difficult-to-reach installation location, enabling safe and easy wire connections while maintaining reliable installation in hard-to-access areas
Solution Approach 2:
The junction box serves as an intermediary element between the external power source and the CMV unit. It provides a convenient external location for making electrical connections, while its connection pins interface with the CMV unit to establish the electrical link, thus mediating between the accessible external environment and the inaccessible installation location
2Ease of manufacture
If the electrical connection is made directly at the CMV unit installation point, then the connection is made at the source, but the operator lacks sufficient space to maneuver tools and perform connection tasks correctly
Solution Approach 1:
The junction box is designed with pre-integrated connection pins that correspond to the CMV unit's connection requirements. The operator can prepare and make electrical connections in advance at the accessible junction box location, ensuring precision and correctness before final installation, rather than attempting connections in the constrained space at the CMV unit location
3Reliability
If the junction box is designed to fit into a cavity of the CMV unit, then the connection is secured and vibration-proof, but the box must be small enough to fit in difficult-to-access locations
Solution Approach 1:
The junction box is designed to nest into a cavity of the CMV unit, with the box fitting partially inside the unit's housing. This nested configuration provides secure mechanical attachment and vibration-proof connections while minimizing the external volume occupied by the junction box, allowing it to be installed in locations with limited space
Data Source
Figure 1
Figure 2~4
Figure 5~6
AI summary
The invention relates to a ventilation system comprising a controlled mechanical ventilation (CMV) unit, which comprises an electrical junction box (1) for connection to the mains of the CMV unit (2), the electrical junction box (1) with a plurality of connectors (3) therein to connect the wiring of the mains, the electrical junction box (1) being attachable on an outer face of the CMV unit (2) so that the connectors (3) are inserted into internal connection pins (4) of the CMV (2), the pins (4) being connected to the electrical/electronic components of the CMV (2) and all the electrical components of the CMV (2) being connected to the mains.