Piezoelectric Pump Layout for Compact Heat Dissipation

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Solution Overview

Problem

Piezoelectric pumps generate heat when driven, and when multiple pumps are compactly disposed, effective heat dissipation is challenging, especially in reduced space.

Innovation Solution

A configuration where first and second piezoelectric pumps are disposed such that high-temperature portions do not face each other, with a connection pipe and a metal lid member facilitating heat dissipation through exposed outer walls and a heat conductive member, ensuring efficient heat dispersion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If multiple piezoelectric pumps are disposed compactly to save space, then the device size is reduced, but heat dissipation becomes difficult and heat accumulates

Engineering Contradiction:

Improvedevice sizeVSAvoidheat dissipation

Core Design Contradiction:

Volume of moving objectVSTemperature

Solution Approach 1:

The patent applies asymmetry by arranging the first and second piezoelectric pumps in an asymmetric configuration where their high-temperature portions (discharge ports and surrounding areas) are positioned on opposite sides of the connection pipe. This asymmetric layout ensures that heat-generating components do not face each other, creating thermal separation that facilitates heat dissipation while maintaining compact overall device dimensions.

Inventive Principle:

Principle #4Asymmetry

2Area of stationary object

If multiple piezoelectric pumps are disposed close to each other, then space is saved, but heat from the housings accumulates due to facing high-temperature portions

Engineering Contradiction:

Improvedisposal spaceVSAvoidheat accumulation

Core Design Contradiction:

Area of stationary objectVSObject-generated harmful factors

Solution Approach 1:

The patent converts the potentially harmful effect of compact arrangement (heat accumulation) into a beneficial configuration by deliberately positioning the pumps such that their discharge ports and high-temperature zones are separated by the connection pipe structure. The connection pipe itself acts as a thermal barrier and conduit, transforming the compact space constraint into an opportunity for effective heat management through strategic component placement.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

Effective heat dissipation is achieved while maintaining a compact design, preventing heat accumulation and allowing for high flow rates and pressure without increasing device size.

Implementation Method 1

a vibration plate that vibrates by driving of a piezoelectric element

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Implementation Method 2

a metal lid member facilitating heat dissipation through exposed outer walls and a heat conductive member

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS12467447B2First and second piezoelectric pumps and connection pipe arrangement

Publication Date: 2025.11.11 MURATA MFG CO LTD

AI summary

A pump device includes a piezoelectric pump, a piezoelectric pump, and a connection pipe. The connection pipe causes a discharge port of the piezoelectric pump to be in communication with a suction port of the piezoelectric pump. The piezoelectric pump and the piezoelectric pump are disposed such that a suction-side outer wall surface in a housing of the piezoelectric pump and a suction-side outer wall surface in a housing of the piezoelectric pump face each other.