Piezoelectric Transducer Internal Ventilation Path for Continuous Cooling
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Solution Overview
Problem
Ultrasonic devices with piezoelectric transducers face overheating issues due to energy dispersion as thermal energy, leading to device failure when used continuously, as existing forced air cooling methods are insufficient for continuous operation.
Innovation Solution
An ultrasonic transducer with a casing that includes an internal ventilation path for cooling air to flow from the outside to the inside, combined with external and internal cooling mechanisms to effectively manage temperature, utilizing a piezoceramic or polymer piezoelectric element sandwiched between a countermass and a connection plate with radial channels for efficient air flow and pressure drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If forced air circulation cooling is used, then cooling effectiveness is improved, but it is insufficient for continuous use due to overheating
Solution Approach 1:
The cooling system is segmented into multiple independent pathways: an internal ventilation path through the piezoelectric device and external cooling paths around the casing. This segmentation allows distributed heat removal from different heat-generating regions, preventing localized overheating and enabling continuous operation.
Solution Approach 2:
The internal ventilation path is nested within the piezoelectric device structure, with cooling channels integrated into the piezoelectric element and surrounding components. The external cooling chamber is nested within the casing, creating a multi-layered cooling architecture that maximizes heat dissipation efficiency.
2Temperature
If internal ventilation path is added, then cooling effectiveness is improved, but device complexity increases
Solution Approach 1:
The cooling function is merged with the structural components of the transducer. The piezoelectric device housing serves dual purposes as both structural enclosure and cooling channel pathway. The connection plate and countermass elements are integrated with cooling channels, eliminating the need for separate cooling components and reducing overall device complexity.
Solution Approach 2:
Existing structural components are given multiple functions: the casing serves as both protective enclosure and external cooling chamber; the connection plate provides both mechanical connection and cooling air passage; the piezoelectric device housing acts as both structural element and internal cooling channel. This multi-functionality reduces the number of dedicated cooling components needed.
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 maintains the transducer's temperature below 30°C, enabling continuous operation without ceramic material breakdown, overcoming the limitations of previous cooling methods.
Implementation Method 1
the transformation of the electrical signal into mechanical force is obtained in the transducer due to the use of a piezoelectric material, which has the ability to polarize, generating a difference in potential when subjected to mechanical deformation (direct piezoelectricity) and vice versa to deform when subjected to a difference in potential which induces a charge polarization therein (inverse piezoelectricity)
Implementation Method 2
the piezoelectric device comprises an internal ventilation path for the passage of cooling air from the outside of the piezoelectric device to the outside of the casing
Implementation Method 3
A problem related to the use of these ultrasonic devices is the dispersion of energy in the form of thermal energy. This causes the device to overheat
Data Source
Figure 1
Figure 2~4
AI summary
The present invention relates to a piezoelectric transducer, of the type normally used in sonication devices, with forced cooling, in particular air cooling. In particular, the invention relates to an ultrasonic transducer device (1) comprising a casing (2) which encloses a piezoelectric device (3), characterized in that the piezoelectric device (3) comprises an internal ventilation path (13, 11, 14) for the passage of cooling air from the outside of the piezoelectric device (3) to the outside of the casing (2).