Kitchen Exhaust Hood Filter Interlock for UV Lamp Shutdown
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Solution Overview
Problem
Existing kitchen exhaust ducts and hoods face the risk of UV light escaping during filter segment replacement, potentially harming individuals nearby.
Innovation Solution
The design incorporates guide devices with a locking insert that allows filter segments to be removed only at a single point, interacting with an electrical switch to interrupt the UV lamp's circuit when the locking insert is removed, ensuring the UV light remains contained until the filter segments are safely replaced.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If filter segments are made removable for replacement and cleaning, then ease of maintenance is improved, but UV light escape risk increases
Solution Approach 1:
The electrical switch is designed to interrupt the UV lamp circuit automatically when the locking insert is removed, before the filter segments can be accessed. This preliminary action of switching off the UV lamp eliminates the harmful effect before the maintenance operation begins.
Solution Approach 2:
The locking insert serves as an intermediary element that couples the filter segment removal mechanism with the electrical switch. It translates the mechanical action of removing a filter segment into an electrical signal that interrupts the UV lamp circuit, mediating between the maintenance operation and the safety function.
2Object-affected harmful factors
If a locking insert with slide mechanism is added to control UV lamp circuit, then UV light safety is improved, but device complexity increases
Solution Approach 1:
The locking insert combines multiple functions into a single component: it serves as a placeholder to prevent filter removal, a mechanical actuator for the electrical switch, and a holder for the slide mechanism. This merging reduces the need for separate components and simplifies the overall structure.
Solution Approach 2:
The locking insert is designed as a multi-functional element that performs both mechanical locking (preventing filter removal) and electrical control (interrupting UV lamp circuit) functions. This multi-functionality reduces device complexity by eliminating the need for separate mechanisms for each function.
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 reliably prevents UV light from escaping during filter segment replacement, ensuring safety by ensuring the UV lamp is switched off before filter segments can be accessed, maintaining a sealed environment against UV radiation.
Implementation Method 1
a slide (17b) guided in this, which can be guided into a position against the force of a spring device (22) and locked in it
Implementation Method 2
at least one lamp generating UV light, which is arranged inside the housing
Implementation Method 3
They are arranged in the direction of flow behind the filter segments, which are often aerosol separators, and cause photolytic oxidation of the organic substances contained in the irradiated area
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The hood (1) has a housing (2) with an opening suitable for the removal of the used air from the cooking area and is fitted with a multitude of filter segments (8) positioned in a row and accommodated inside the housing (2). When a filter segment (8) has to be replaced it can be moved along a guide (9,10) and only be taken out at a particular gap (9b). The gap (9b) is closed with a locking element (17b) acting on a control switch (13) activating the ultraviolet light only when the suction hood (1) is used and interrupting the circuit when a segment (8) is exchanged.