Volatile Material Dispenser Heater Layout for Condensation Control

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Solution Overview

Problem

Existing volatile material dispensers face issues with condensation buildup and inefficient heater performance, leading to sub-optimal volatile material distribution and plume dispersion.

Innovation Solution

A heater arrangement for volatile material dispensers featuring a cylinder with an embedded resistor and a heater chassis, designed to minimize condensation and enhance plume output, with a radial gap between the heater and wick, and a chimney structure to optimize heat transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If existing heater arrangements are used in volatile material dispensers, then the dispensers can operate and emit volatile material, but condensation builds up on interior surfaces and heater efficiency is poor

Engineering Contradiction:

Improveheater efficiencyVSAvoidcondensation buildup

Core Design Contradiction:

Loss of energyVSObject-affected harmful factors

Solution Approach 1:

The heater assembly is segmented into distinct functional components: a heater element, a chimney structure, and a baffle component. This segmentation allows each component to perform its specific function optimally - the heater generates heat, the chimney directs hot air flow, and the baffle prevents condensation - while working together to resolve the contradiction between heater efficiency and condensation prevention

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The chimney structure acts as an intermediary between the heater element and the volatile material reservoir. It mediates the heat transfer process by channeling hot air from the heater through a controlled path that enhances volatile material vaporization while preventing direct contact between hot air and condensation-prone surfaces, thus improving heater efficiency without causing condensation buildup

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If existing venting systems are used to minimize condensation, then condensation formation is reduced, but plume dispersion is disrupted or inhibited

Engineering Contradiction:

Improvecondensation formationVSAvoidplume dispersion

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The baffle component introduces local quality variations in the air flow path. It creates specific zones with different flow characteristics - areas of high velocity for plume ejection and areas of recirculation for heat distribution. This localized flow control prevents condensation in critical areas while maintaining strong plume dispersion performance

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The chimney structure adds a vertical dimension to the heat and vapor flow path. By directing hot air upward through the chimney before it reaches the volatile material reservoir, the system creates a three-dimensional flow pattern that enhances plume dispersion while preventing condensation on horizontal surfaces through the vertical air movement

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Power

If more power is supplied to the heater, then volatile material vaporization is enhanced, but power consumption increases

Engineering Contradiction:

Improvevaporization effectivenessVSAvoidpower consumption

Core Design Contradiction:

PowerVSUse of energy by moving object

Solution Approach 1:

The system replaces direct high-power heating of a large area with a mechanically-guided concentrated heat flow path through the chimney. This substitution allows lower power input to achieve the same vaporization effectiveness by directing heat energy more efficiently through the volatile material, reducing overall power consumption while maintaining effective vaporization

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

The new design reduces power consumption, enhances plume strength and consistency, and minimizes condensation, outperforming existing dispensers in efficiency and performance.

Implementation Method 1

a heater arrangement for a volatile material dispenser includes a cylinder defining an opening and a resistor embedded in the cylinder

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

a radial gap is formed between the heater arrangement and the wick

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20260069736A1Dispenser with an improved heater arrangement

Publication Date: 2026.03.12 SC JOHNSON & SON INC

AI summary

A volatile material dispenser includes a housing that receives a refill that contains a volatile material and a wick. The volatile material dispenser further includes a heater arrangement that includes a heater that is coupled to a heater chassis using a first latch that abuts a first latch receiving portion of the heater. The heater chassis defines a passage therethrough that is receives a portion of the wick. Further, a top cover is coupled to the housing and defines a central aperture through which a vapor plume exits the housing. The top cover includes an annular wall having a first surface, a second surface opposite therefrom, an outer edge, and an inner edge that defines the central aperture. The top cover further comprises a plurality of apertures arranged at least partially around the central aperture, and the first surface includes a concave portion.