Heat Circulation Pump Terminal Box Integration
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Solution Overview
Problem
Existing heating circulating pumps face challenges in reducing manufacturing and assembly costs while improving reliability and design uniformity, especially in large series production where small improvements can lead to significant savings.
Innovation Solution
The integration of a terminal box housing that overlaps or completely encases the stator housing, eliminating the need for separate machining and allowing for a unified, aesthetically appealing design that reduces parts and external dimensions, with snap connections for secure attachment and protection against moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the terminal box housing is designed to overlap and encase the stator housing, then the manufacturing complexity is reduced and design uniformity is improved, but the device complexity increases due to the integrated structure
Solution Approach 1:
The terminal box housing is merged with the stator housing to form an integrated structure where the terminal box housing overlaps and encases the stator housing. This combining of functions reduces the number of separate components and simplifies manufacturing processes while maintaining protective functions.
Solution Approach 2:
The terminal box housing serves multiple functions: it provides electrical terminal housing, protects the stator housing, provides structural support, and contributes to the overall pump housing structure. This multi-functionality reduces the need for separate protective components.
2Reliability
If the terminal box housing completely encases the stator housing, then the protection against moisture ingress is improved, but the accessibility for maintenance and repair deteriorates
Solution Approach 1:
The terminal box housing is designed to overlap and partially encase the stator housing in a nested configuration. This allows the terminal box to provide protection while still permitting access to the stator housing through the overlapping region for maintenance and repair operations.
3Manufacturing precision
If the stator housing is made as a separate metal casting, then the manufacturing precision is improved, but the manufacturing cost increases
Solution Approach 1:
The housing structure utilizes composite construction where the terminal box housing and stator housing can be made from different materials optimized for their specific functions. This allows for cost-effective manufacturing while maintaining the precision requirements of the stator housing through the integrated design.
Data Source
Figure 1
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AI summary
The heat circulation pump has a pump housing (1) having a pump impeller (4) which is driven by electric motors (6,7). A stator housing (8) has a flange that is provided on the pump housing. A junction box housing (15) for electrical connection of motors, is provided. The junction box housing is engaged over the stator housing from the side facing away from the pump side into the region of the flange.