Dishwasher Heater Housing Air Gap for Heat Loss Reduction
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Solution Overview
Problem
Dishwashers with heaters lack effective heat insulation, leading to increased manufacturing costs, energy inefficiency, and potential damage to housing components due to heat deformation, as well as inefficient heat retention for moisture-absorbing devices.
Innovation Solution
A dishwasher design featuring a heater housed in a resistant heater housing with a separation space between the heater and main housing, and an additional sub housing for further insulation, forming multiple separation spaces to minimize heat loss and enhance energy efficiency without additional insulation materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a heater without a case is accommodated in an inner passage of a housing accommodating the absorbent or in an air supply duct connected to the housing, then the device complexity is reduced, but the housing may be deformed or damaged by heat generated by the heater
Solution Approach 1:
The housing is divided into two separate parts: a heater housing that accommodates the heater and a main housing that accommodates the absorbent. This segmentation isolates the heat source from the housing that could be damaged, allowing the heater to operate without directly contacting the main housing structure.
Solution Approach 2:
An air layer is introduced as an intermediary between the heater housing and the main housing. This air layer acts as a thermal barrier that reduces heat transfer to the main housing, preventing deformation or damage while allowing the heater to generate necessary heat for the absorbent.
2Reliability
If the housing or the air supply duct is made of a material having predetermined heat resistance, then the reliability is improved, but the manufacturing costs increase
Solution Approach 1:
The housing structure is segmented into a heater housing and a main housing. The heater housing can be made of heat-resistant material to protect against thermal damage, while the main housing can use standard, more cost-effective materials. This selective material application reduces overall manufacturing costs while maintaining necessary reliability.
Solution Approach 2:
The air layer between the heater housing and main housing serves as a thermal intermediary that reduces heat transfer. This allows the main housing to use less expensive materials with lower heat resistance requirements, as the air gap provides sufficient thermal protection.
3Device complexity
If no additional heat insulation means is provided to the outside of the housing or the air supply duct, then the device complexity is reduced, but power consumption increases and energy efficiency deteriorates
Solution Approach 1:
An air layer is introduced as a thermal intermediary between the heater housing and the main housing. This air layer acts as natural insulation that reduces heat loss to the surrounding structure, improving energy efficiency without adding complex insulation materials or structures.
Solution Approach 2:
The air layer provides self-service heat insulation by utilizing the natural thermal resistance of air. This passive insulation mechanism reduces heat loss without requiring active control systems or complex insulation structures, maintaining simplicity while improving energy efficiency.
4Productivity
If a heater is used to form a high-temperature air current for reproducing an absorbent during a washing procedure, then the productivity is improved, but heat is released outward causing energy inefficiency
Solution Approach 1:
The heater is segregated into its own housing that is thermally isolated from the main housing by an air layer. This segmentation contains the heat within the heater housing, allowing efficient heating of air for absorbent reproduction while preventing heat loss to the external environment through the main housing.
Solution Approach 2:
The air layer between the heater housing and main housing serves as a thermal barrier that traps heat within the heater housing. This intermediary layer prevents heat generated during the drying procedure from escaping outward, improving energy efficiency while maintaining high productivity.
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 minimizes heat-related damage to the main housing, improves energy efficiency by reducing heat loss, and simplifies manufacturing while maintaining effective heat insulation for the moisture-absorbing device, reducing costs and improving reproduction efficiency.
Implementation Method 1
a heater disposed between the air blowing fan and the absorbent with respect to the flow direction of the air current and configured to heat an air current to be supplied to the absorbent
Implementation Method 2
a first predetermined separation space is formed between the heater housing and the main housing, to form a heat insulation air layer for the heater and the heater housing, thereby minimizing a release of heat of the heater to the outside of the main housing
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present disclosure relates to a dishwasher in which a first predetermined separation space is formed between a heater housing and a main housing, to form a heat insulation air layer for a heater and a heater housing, thereby minimizing a release of heat of the heater to the outside of the main housing and ensuring improvement in energy efficiency.