Construction unit for a heating system
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Solution Overview
Problem
Existing structural units for compact heating systems require complex and costly plastic injection molded parts, with high tooling costs and material inefficiencies, as they need to accommodate different thermal and chemical requirements for service water and heating water, while maintaining a stable and compact design.
Innovation Solution
The structural unit is divided into two assembly parts made of different materials, with the flow assembly split into parts for space heating and domestic water heating, connected via a plate heat exchanger, allowing for detachable mechanical and hydraulic connections, reducing tooling complexity and enabling the use of cost-effective materials based on specific requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the flow assembly is designed as a single plastic injection molded part to accommodate both space heating and domestic water heating, then the structure is compact and stable, but the tooling costs are high and material requirements are complex
Solution Approach 1:
The flow assembly is divided into two separate plastic injection molded parts: a heating water flow assembly part and a service water flow assembly part. Each part is manufactured independently with its own tooling, reducing the complexity and cost of single large-mold tooling while allowing specialized material selection for each fluid type.
Solution Approach 2:
Different materials are selected for different parts based on local requirements: the service water flow assembly part uses materials meeting drinking water quality requirements, while the heating water flow assembly part uses materials suited for thermal loads. This localized material optimization reduces overall manufacturing complexity and cost.
2Reliability
If different materials are used for service water and heating water components, then material requirements are optimized, but the number of tools required increases
Solution Approach 1:
The flow assembly is segmented into separate parts for service water and heating water, allowing each to be manufactured with materials optimized for its specific fluid type. This segmentation enables material reliability without requiring a single multi-material tooling system.
Solution Approach 2:
The divided assembly design creates universal, standardized connection interfaces between parts. The same connection design can be reused across different assembly configurations, reducing the number of unique tools needed despite using different materials for different parts.
3Ease of manufacture
If the flow assembly is divided into multiple parts, then tooling costs are reduced and material selection is optimized, but the assembly complexity increases
Solution Approach 1:
Dividing the flow assembly into separate injection-molded parts reduces tooling costs by allowing simpler, dedicated molds for each part. The segmentation is designed so that parts connect through standardized interfaces, minimizing assembly complexity despite the increased number of components.
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 reduces tooling costs and material complexity, allowing for efficient production with fewer tools and enabling the use of materials optimized for each fluid type, while maintaining a compact and stable structure, with improved accessibility for maintenance components like pressure relief valves and bypass valves.
Implementation Method 1
a plate heat exchanger, with which these assemblies are connected
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The unit is designed for a heating system with two heating circuits, one for space heating and one for domestic water heating, which are supplied with a heat-carrying medium via a common primary heat exchanger. It has a flow assembly (1), which has connections (5, 6, 11) for the flow of the space heating, for heating the service water and for the outlet of the primary heat exchanger, and a return assembly (2), which has connections (8, 7, 40) for the Return of the space heating, has to return the domestic water heating and to the input of the primary heat exchanger. The assemblies (1) and (2) are connected via a plate heat exchanger (3) and the flow assembly (1) is made up of two assembly parts (9) and (10), of which one assembly part (9) has the connection (11) to the Output of the primary heat exchanger and the connection (5) to the flow of the room heating and the other assembly part (10) has the flow connection to the plate heat exchanger (3) for domestic water heating and two domestic water connections (6), one of which is connected to the plate heat exchanger (3) connects and the other to a service water line (6). The assembly parts (9) and (10) are each designed as plastic injection molded parts, however, made of different materials and have connections pointing towards one another, via which they are detachably connected to one another mechanically and directly hydraulically. (Fig.1)