Two-part reflector holder for ultrasonic flow sensor

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Solution Overview

Problem

Existing reflector arrangements for ultrasonic flow sensors are cumbersome and time-consuming to mount due to the requirement of carefully inserting reflectors between two holder elements that form cooperative seatings.

Innovation Solution

A reflector arrangement where each holder element has a unitary reflector seating adapted to securely hold a reflector independently, using multiple fixation elements to prevent movement and ensure a strong, secure fit, allowing for easy and reliable mounting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If two holder elements form cooperative reflector seatings, then the reflector arrangement provides a cylindrical outer shape, but the mounting process becomes complicated and time-consuming

Engineering Contradiction:
Improvecylindrical outer shapeVSAvoidmounting time
Core Design Contradiction:
ShapeVSLoss of time

Solution Approach 1:

The holder is divided into two separate holder elements that can be manufactured and prepared independently, yet each element contains its own complete reflector seating structure. This segmentation allows for simplified individual assembly while maintaining the overall cylindrical shape when combined.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The reflector seatings are pre-formed as integral parts of each holder element during manufacturing, rather than requiring assembly from separate components. This preliminary formation of seatings eliminates the need for careful insertion and adjustment during mounting, significantly reducing mounting time.

Inventive Principle:
Principle #10Preliminary action

2Shape

If two holder elements form cooperative reflector seatings, then the cylindrical shape is achieved, but the mounting process requires careful insertion

Engineering Contradiction:
Improvecylindrical outer shapeVSAvoidease of mounting
Core Design Contradiction:
ShapeVSEase of operation

Solution Approach 1:

By dividing the holder into two independent elements with self-contained seatings, each element becomes easier to handle and mount individually without requiring precise coordination between elements during assembly.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Each holder element is self-sufficient with its own reflector seating structure, allowing the reflector to be mounted on one element independently without requiring simultaneous alignment with the other element. This self-service design greatly simplifies the mounting operation.

Inventive Principle:
Principle #25Self-service

3Shape

If the reflector seating is formed by two holder elements, then the cylindrical structure is maintained, but the reflector may move or get lost

Engineering Contradiction:
Improvecylindrical structureVSAvoidreflector stability
Core Design Contradiction:
ShapeVSReliability

Solution Approach 1:

Each holder element is designed with locally optimized reflector seating features including multiple fixation elements (clips, lugs, or engagement protrusions) that provide secure retention. This local quality enhancement ensures the reflector cannot move or detach, while the overall cylindrical structure is maintained through the arrangement of the two elements.

Inventive Principle:
Principle #3Local quality

Data Source

PatentEP3347682B1Two part reflector holder for an ultrasonic flow sensor
Publication Date: 2020.06.24 DANFOSS AS
  • EP3347682B1 patent drawingFigure 1
  • EP3347682B1 patent drawingFigure 2
  • EP3347682B1 patent drawingFigure 3

AI summary

The present invention relates to a reflector arrangement (9) for installation in an ultrasonic flow sensor (11), the reflector arrangement (9) comprising two or more holder elements (1, 1') attached to each other, the holder elements (1, 1') together giving the reflector arrangement (9) a basically cylindrical outer shape, the holder elements (1, 1') providing one or more reflector seatings (2, 2') in order to secure one or more reflectors (3, 3'). Furthermore the invention relates to a method for producing a holder element (1, 1') as a part for a reflector arrangement (9) for installation in an ultrasonic flow sensor (11), the holder element (1, 1') comprising an elongated cylindrical outer wall structure (7, 7') for forming the basically cylindrical outer shape of the reflector arrangement (9). Installing the reflector (3, 3') on the reflector seating (2, 2') of the holder element (1, 1') occurs during a molding process of the holder element (1, 1'). This allows easy and stable mounting of the reflector (3, 3') in the reflector arrangement (9).