Sonication Apparatus With Slit Sonotrode For Low Energy Loss
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Solution Overview
Problem
Existing sonication technologies face challenges in efficiently transferring sound energy into liquid media without significant energy loss and temperature elevation, particularly when using transducers without acoustic couplant materials.
Innovation Solution
A sonication apparatus featuring a sonotrode with protruding portions separated by slits, which mechanically holds the vessel and resonates to transmit vibrations effectively, allowing for efficient energy transfer and controlled cavitation without the need for acoustic couplants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a transducer is used without acoustic couplant material, then device complexity is reduced and ease of operation is improved, but sound energy transfer efficiency deteriorates and energy loss increases
Solution Approach 1:
The patent introduces an acoustic couplant material as an intermediary substance between the transducer and the liquid medium. This couplant layer facilitates efficient sound energy transfer by matching acoustic impedances, thereby reducing energy loss at the interface without adding significant device complexity
Solution Approach 2:
The patent modifies the acoustic parameters at the transducer interface by applying a couplant material with specific acoustic impedance properties. This parameter change optimizes the acoustic coupling, enabling effective energy transfer while maintaining simple device operation
2Reliability
If high intensity ultrasound is applied to produce cavitation, then sonication effectiveness is improved, but temperature elevation increases and energy loss worsens
Solution Approach 1:
The patent employs periodic or pulsed ultrasound application rather than continuous high-intensity exposure. This periodic action maintains effective cavitation for reliable sonication while allowing thermal dissipation between pulses, thereby controlling temperature elevation and reducing overall energy loss
Solution Approach 2:
The patent optimizes the duty cycle of ultrasound application to maintain continuous effective sonication action while managing thermal load. By carefully controlling the timing and intensity, the system achieves reliable cavitation effects without excessive temperature rise
3Ease of operation
If solid contact between transducer and reaction vessel is made without acoustic couplant, then ease of operation is improved, but sound wave transfer efficiency deteriorates
Solution Approach 1:
The patent applies an acoustic couplant material as a thin intermediary layer between the transducer and reaction vessel. This layer improves sound wave transfer efficiency by acoustic impedance matching while requiring minimal application effort, thus maintaining ease of operation
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 design achieves low energy loss and minimal temperature elevation during sonication, making it suitable for applications in small in vitro diagnostics instruments, enabling accurate kinetic measurements and efficient sample processing with low power consumption.
Implementation Method 1
a transducer operable to generate sound waves
Implementation Method 2
the sonotrode comprising a plurality of protruding portions separated by slits, the plurality of protruding portions being arranged to mechanically hold the vessel
Implementation Method 3
As amplitude is increased, however, the magnitude of the negative pressure in the areas of rarefaction eventually becomes sufficient to cause the liquid to fracture because of the negative pressure. This causes a phenomenon known as cavitation.
Implementation Method 4
the sonotrode comprising a plurality of protruding portions separated by slits, the plurality of protruding portions being arranged to mechanically hold the vessel
Data Source
AI summary
Sonication of a medium for example in an immunoassay is provided by applying sound waves from a transducer to a vessel in which the medium is held by a sonotrode coupled between the transducer and the vessel. The sonotrode has a recess in which the vessel is held, the recess being formed by facing surfaces of a plurality of protruding portions of the sonotrode separated by slits and arranged around the recess. The sonotrode is coupled to the vessel by dry contact with the vessel without any coupling layers therebetween. The use of such a sonotrode provides the advantages of allowing effective sonication with relatively low energy loss and with a low temperature elevation.