Sensor apparatus
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Solution Overview
Problem
Existing sensor apparatuses in water-using household appliances face challenges in positioning sensors to ensure interference-free detection of process parameters, particularly turbidity and additive presence in the process liquid, without compromising the electrical connections and structural integrity.
Innovation Solution
A sensor apparatus with a first sensor arrangement and a second sensor arrangement spaced along a height axis, utilizing pin-like contact elements for electrical connections, and a compact design that eliminates the need for light guides, allowing for efficient detection of both optical and electrical process parameters without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If multiple sensors are arranged in the housing to detect process parameters, then detection capability is improved, but interference between sensors occurs and positioning becomes complex
Solution Approach 1:
The patent resolves sensor interference by transitioning from a planar sensor arrangement to a three-dimensional configuration. The first sensor arrangement is positioned on the circuit board in a first horizontal plane, while the second sensor arrangement is positioned on a holder element in a second horizontal plane at a different height. This vertical separation in the height direction eliminates optical or electrical interference between sensors while maintaining comprehensive detection capability for process parameters.
2Difficulty of detecting and measuring
If the second sensor arrangement is positioned separately from the circuit board, then interference-free detection is achieved, but electrical connection becomes more difficult
Solution Approach 1:
The holder element serves as an intermediary component that bridges the gap between the circuit board and the second sensor arrangement. It provides both mechanical support for the second sensor arrangement and integrates pin-like contact elements that establish electrical connections to the circuit board. This mediator structure enables separate positioning for interference-free detection while maintaining ease of electrical connection.
Solution Approach 2:
The holder element performs multiple functions simultaneously: it mechanically supports the second sensor arrangement, provides electrical connections via pin-like contact elements, and positions the sensors in the height direction to prevent interference. This multi-functional design simplifies the overall structure and ease of manufacture.
3Volume of moving object
If a compact sensor arrangement is used, then device size is reduced, but thermal expansion effects increase
Solution Approach 1:
The holder element is designed with dynamic characteristics that allow it to expand and contract in response to thermal changes. This dynamic structure accommodates thermal expansion effects while maintaining the compact three-dimensional sensor arrangement, ensuring reliability without increasing device volume.
Data Source
AI summary
A sensor apparatus for a water-using household appliance for detecting at least one process parameter includes a housing in which at least one circuit board, a first sensor arrangement and a second sensor arrangement are arranged. The first sensor arrangement is arranged on the at least one circuit board. The second sensor arrangement is spaced apart from the first sensor arrangement along a height axis. A holder element is arranged on the at least one circuit board, on or in which at least one pin-like contact element is arranged. The at least one pin-like contact element is intended and suitable for providing an electrical connection between the second sensor arrangement and the at least one circuit board.