Flow Channel Cap Plate Layout for Low-Pressure-Loss Combustion Insulation

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Solution Overview

Problem

In water heaters, long or complex flow channels for heating water can lead to pressure drops, causing circulation issues due to loss of pressure, which affects the smooth flow of heating water and the durability of heat exchangers when directly exposed to combustion reactions.

Innovation Solution

A flow channel cap plate design that forms an insulating flow channel around the combustion chamber, with inlet and outlet pipelines on either side, reducing pressure loss and enhancing insulation by distributing heating water evenly and reducing friction through a ring-shaped inlet and outlet space formation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If heating water flows through long or complex pipelines around the combustion chamber for insulation, then insulation performance is improved, but pressure drop increases causing circulation problems

Engineering Contradiction:
Improveinsulation performanceVSAvoidpressure drop
Core Design Contradiction:
TemperatureVSStress or pressure

Solution Approach 1:

The flow channel cap plate divides the heating water flow into multiple separate inlet pipelines that distribute water to different locations around the combustion chamber. This segmentation allows the flow path to be shorter and more direct while still providing comprehensive insulation coverage, thereby reducing pressure drop while maintaining insulation effectiveness.

Inventive Principle:
Principle #1Segmentation

2Productivity

If flame directly contacts the heat exchanger to transfer heat, then heating efficiency is improved, but durability of the heat exchanger deteriorates

Engineering Contradiction:
Improveheating efficiencyVSAvoiddurability of heat exchanger
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The combustion chamber serves as an intermediary component between the flame and the heat exchanger. It allows the flame to burn within the chamber while directing the hot combustion gases to contact the heat exchanger, thus transferring heat effectively without exposing the heat exchanger to direct flame contact, preserving its durability.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Productivity

If the combustion chamber is heated to high temperature for effective combustion, then combustion efficiency is improved, but material deformation and burning risk increase

Engineering Contradiction:
Improvecombustion efficiencyVSAvoidmaterial deformation and burning risk
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The flow channel cap plate with multiple inlet pipelines segments the heat transfer process, allowing heat to be distributed to multiple locations around the combustion chamber. This creates a more uniform thermal environment that prevents localized overheating and material deformation while maintaining overall combustion efficiency.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The insulating flow channel acts as a thermal intermediary, managing heat distribution around the combustion chamber. It allows the chamber to operate at high temperatures for efficient combustion while controlling heat transfer to surrounding materials, preventing burning risks and deformation.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 solution effectively reduces pressure loss and maintains excellent insulation performance, ensuring smooth water circulation and protecting the heat exchanger from high temperatures by distributing heating water evenly and reducing friction.

Implementation Method 1

when the flow channel, in which the heating water flows, is long or has many parts that change the directions of the flows of the heating water, a pressure drop due to loss of the pressure of the heating water may occur

Methodology Applied
Scientific EffectPressure drop: Pressure Drop

Implementation Method 2

heat is transferred to the heating water flowing in the heat exchanger mainly by using the combustion gas

Methodology Applied
Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 3

A combustion reaction is induced by using a burner to generate heat from a water heater

Methodology Applied
Scientific EffectCombustion: Combustion

Implementation Method 4

heat is transferred to the heating water flowing in the heat exchanger mainly by using the combustion gas

Methodology Applied
Scientific EffectHeat transfer: Convection

Implementation Method 5

The insulation means may include a method for causing heating water to flow along pipelines disposed around a combustion chamber

Methodology Applied
Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS11692739B2Flow channel cap plate and combustion chamber assembly including the same
Publication Date: 2023.07.04 KYUNGDONG NAVIEN CO LTD
  • US11692739B2 patent drawing
  • US11692739B2 patent drawing
  • US11692739B2 patent drawing

AI summary

An aspect of the present disclosure provides a flow channel cap plate that constitutes a combustion chamber assembly including a combustion chamber and a plurality of insulating pipelines disposed on left/right side surfaces of the combustion chamber, the flow channel cap plate forming an insulating flow channel by covering the front surface of the combustion chamber, the flow channel cap plate including an inlet part including an inlet, and an inlet flow channel cap covering the front surface of the combustion chamber, an inlet space part is formed by covering the front surface of the combustion chamber with the inlet flow channel cap, the inlet is an entrance of the insulating flow channel, the plurality of insulating pipelines include a plurality of inlet insulating pipelines, and the inlet space part is a space that communicates the inlet with the plurality of inlet insulating pipelines.