Connection box for condensate pumps in air-conditioning units
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Solution Overview
Problem
The existing air-conditioning systems face challenges with condensate management, particularly in commercial settings where manual emptying of condensate reservoirs is impractical, and the integration of condensate pumps with building management systems (BMS) requires complex wiring, posing safety risks and installation difficulties.
Innovation Solution
A connection box with clearly labeled and spatially arranged terminal blocks simplifies the installation of condensate pumps and air-conditioning units, allowing for safe and efficient integration with BMS systems by providing a safe electrical connection mechanism and enabling high water level alerts to be transmitted without additional wiring, thus preventing overflow and ensuring proper system operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If condensate pumps are used to drain condensate automatically, then manual emptying is eliminated and smaller reservoirs can be used, but the system becomes less reliable due to moving parts and requires complex wiring for BMS integration
Solution Approach 1:
A connection box is introduced as an intermediary device between the condensate pump and the evaporator/AC unit. This connection box provides a standardized interface with pre-configured wiring terminals, simplifying BMS integration and reducing installation complexity while maintaining the automatic drainage function through the pump.
2Adaptability or versatility
If condensate pumps are integrated with BMS, then centralized control is achieved, but complex wiring is required and installation becomes difficult
Solution Approach 1:
The system is segmented into modular components: the condensate pump, the connection box with standardized terminals, and the evaporator/AC unit. This segmentation allows the connection box to serve as a standalone interface module that simplifies BMS integration through pre-configured wiring terminals, reducing overall installation complexity.
Solution Approach 2:
The connection box is designed with universal functionality to interface with both BMS systems and standard AC units. It provides standardized connection terminals that can accommodate different wiring configurations, making it adaptable to various control systems while maintaining consistent installation procedures.
3Reliability
If high water level switches are installed in condensate pumps, then overflow protection is provided, but the system requires additional wiring and configuration knowledge
Solution Approach 1:
The high water level switch functionality is merged into the connection box design. The connection box integrates the water level detection circuitry and wiring terminals in a single unit, eliminating the need for separate switch installation and reducing wiring complexity. The standardized terminals provide clear labeling that guides installers through the connection process.
4Adaptability or versatility
If installers re-wire AC units and condensate pumps for BMS integration, then centralized control is achieved, but installation time increases and safety risks arise from improper wiring
Solution Approach 1:
The connection box is pre-configured with standardized wiring terminals and connection diagrams during manufacturing. This preliminary preparation of the wiring interface eliminates the need for installers to perform complex re-wiring operations, reducing installation time and minimizing safety risks associated with improper wiring practices.
Data Source
AI summary
The connection box of the present invention provides a simple and safe method to integrate an AC unit and condensate pump into a larger building management system. This is possible because the circuit is configured to require high water level sensors are connected to the connection box in order for power to be provided to operate the AC unit. An installer only has to connect the external wires of the AC unit, condensate pump and building management system to the respective designated connection terminals within the connection box. The designated terminal connections provide a clearly labelled instruction to an installer and aid safe and proper installation of AC units and remove the need to re-wire the internal wiring of the AC unit.