Integrated Smoke Detector Self-Testing Aerosol Generator
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Solution Overview
Problem
Existing smoke detector testing methods require external testers and additional wiring, resulting in increased footprint and the need for specialist installation, which can be unsightly and inconvenient for retrofitting existing sites.
Innovation Solution
Incorporating a detection chamber, aerosol generator, and controller within the smoke detector unit to generate and test aerosol internally, eliminating the need for external testers and wiring, and allowing for self-testing without additional equipment or specialist installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external smoke detector tester is used, then the smoke detector can be tested for aerosol detection capability, but additional wiring and a larger footprint are required
Solution Approach 1:
The patent combines the smoke detector and aerosol generator into a single integrated unit. The aerosol generator is disposed within the housing of the smoke detector, eliminating the need for separate external testing equipment and additional wiring. This merging of functions directly resolves the contradiction by maintaining testing capability while reducing device complexity and wiring requirements.
Solution Approach 2:
The smoke detector unit is designed to perform multiple functions: normal smoke detection operation and self-testing using an integrated aerosol generator. This multi-functionality allows the device to test its own aerosol detection capability without requiring external tester equipment, thereby reducing wiring complexity while maintaining reliability.
2Reliability
If an external smoke detector tester is mounted in the vicinity of the smoke detector, then the smoke detector can be tested, but the footprint increases and it becomes unsightly
Solution Approach 1:
The aerosol generator is integrated within the housing of the smoke detector itself, eliminating the need for separate external testing equipment. This merging reduces the overall footprint by consolidating multiple functions into a single unit, directly addressing the contradiction between maintaining testing capability and minimizing space occupation.
3Reliability
If external aerosol generator devices on long poles are used for testing, then the smoke detector can be tested, but additional wiring and specialist installation are required
Solution Approach 1:
The smoke detector unit incorporates its own aerosol generator that can be activated to perform self-testing. This self-service capability eliminates the need for external testing equipment and specialist installation, as the unit tests itself using the integrated aerosol generator, thereby resolving the contradiction between testing capability and installation complexity.
Solution Approach 2:
By integrating the aerosol generator within the smoke detector housing, the patent eliminates the need for separate external devices and additional wiring. This merging simplifies installation by removing the requirement for specialist installers to fit additional equipment, directly addressing the ease of manufacture parameter while maintaining testing reliability.
4Loss of time
If the aerosol generator is activated immediately, then the test can be performed quickly, but the aerosol may not be properly generated from the reservoir
Solution Approach 1:
The controller is configured to activate the aerosol generator after a predetermined time interval following activation of the flow controller. This preliminary action ensures that the aerosol generator is activated at the appropriate moment when the aerosolizable material has been properly positioned in the reservoir, ensuring reliable aerosol generation while maintaining efficient test timing.
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 solution reduces the footprint of the smoke detector system, simplifies installation, and enables self-testing, ensuring that the smoke detector unit can validate its functionality without external components, thus enhancing convenience and efficiency in maintenance.
Implementation Method 1
an aerosol generator disposed within the housing, wherein the aerosol generator is configured to generate an aerosol using an aerosolisable material such that the generated aerosol is released into the detection chamber in use
Data Source
AI summary
The smoke detector unit according to the present disclosure has a detection chamber (or test chamber) and an aerosol generator, both of which are disposed inside the smoke detector unit. The aerosol generator can generate a test aerosol using an aerosolisable material, and is able to release the test aerosol directly into the detection chamber. The aerosolisable material may be a solid, or a fluid (e.g. a liquid or a gas). The smoke detector unit, or an external device such as a control panel, may determine that a safety test has been validly passed if the test aerosol clears from the detection chamber within a specified time period.