Ceiling-Mounted Ducted Heater for Safe Shower and Bathroom Heating

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Solution Overview

Problem

Conventional electric heaters are not suitable for bathrooms or shower stalls due to water exposure risks and are inefficient in distributing heat evenly, as they operate close to the ground and fail to utilize hot air near the ceiling.

Innovation Solution

A wall or ceiling mounted ducted heating system with a centrifugal fan, heating coils, and a controller, which uses an insulated duct to circulate heated air from the ceiling to the floor, ensuring safe operation and even heat distribution without taking up floor space.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a portable floor-based heater is used, then heating function is provided, but water exposure safety is compromised and floor space is occupied

Engineering Contradiction:
Improvewater exposure safetyVSAvoidfloor space occupation
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The heater is mounted on the wall in a vertical orientation rather than being placed on the floor horizontally. This dimensional change moves the heating device from the floor plane to the wall plane, eliminating floor space occupation while maintaining heating functionality in bathrooms.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The heating element and critical components are extracted from the floor-based portable unit and integrated into a wall-mounted structure. This extraction removes the safety hazard of having electrical heating components near water sources on the floor while preserving the core heating function.

Inventive Principle:
Principle #2Taking out (Extraction)

2Productivity

If a floor-based heater operates close to the ground, then heating is provided, but hot air near the ceiling cannot be captured and recirculated

Engineering Contradiction:
Improveheat circulation efficiencyVSAvoidhot air utilization
Core Design Contradiction:
ProductivityVSLoss of energy

Solution Approach 1:

Instead of heating air from the floor level as conventional heaters do, this system inverts the approach by capturing hot air that has naturally risen to the ceiling and redistributing it back down through wall-mounted vents. This inversion leverages natural convection patterns to improve heating efficiency.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The system implements a feedback loop where temperature sensors detect hot air accumulation near the ceiling and trigger the wall-mounted fan to recirculate this heat back into the room. This feedback mechanism ensures continuous utilization of available thermal energy, improving overall heating productivity.

Inventive Principle:
Principle #23Feedback

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 system provides safe and efficient heat distribution in wet environments and promotes even heat circulation by utilizing the warmest air near the ceiling, reducing the heating load and eliminating the risk of water exposure.

Implementation Method 1

an internally located centrifugal fan

Methodology Applied
Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

at least one heating coil

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 3

heating coil

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 4

elongated insulated duct

Methodology Applied
Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS12117207B2Ducted room and shower heating system
Publication Date: 2024.10.15 HOFFACKER ANDREW
  • US12117207B2 patent drawing
  • US12117207B2 patent drawing
  • US12117207B2 patent drawing

AI summary

This heating system consists of a ceiling or wall mounted housing containing a fan, motor, electric heater and optional controller which connects to a discharge vent via a duct which can all fit within a wall. It has primary usages as a room or shower heater where it can be recessed into a wall or ceiling where it intakes air from the room, heats it and routes it through an insulated duct in the wall and vents it back into the room near the floor. In a shower, the heater can be located high on the wall or in the ceiling away from the shower to keep it away from splashed water. Additionally, the heater and vent can both be mounted in the ceiling where the heater is outside the shower and the vent is in the shower. It can be controlled by a switch, wired thermostat or wireless remote.