Bathing Control System Power Distribution Logic
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Solution Overview
Problem
Existing bathing installations, such as spas and hot tubs, have complex electrical systems that require significant electric power, making them difficult to operate with a single external electric line.
Innovation Solution
A bathing apparatus with a whirlpool pump, heater, air blower, drain pump, and an electric module that distributes power such that when power is given to one component, it cannot be given to another, allowing for operation with a single 120V/20A power line by using a controller to manage electrical switching between components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple components (whirlpool pump, heater, air blower, drain pump) are powered simultaneously through a complex electrical system, then each component can operate independently, but the system requires significant electric power and complex wiring beyond a single external line
Solution Approach 1:
The electrical system dynamically switches power distribution between components based on operational priority. The controller activates or deactivates specific components (heater, air blower, whirlpool pump, drain pump) depending on which function is currently needed, transforming a static parallel power distribution system into a dynamic sequential one that adapts to real-time operational requirements.
2Device complexity
If a single external electric line is used to power the bathing apparatus, then the electrical system becomes simpler and easier to install, but the ability to operate multiple components simultaneously is lost
Solution Approach 1:
The electrical system is segmented into priority groups: the drain pump operates on a separate circuit from other components, while the heater, air blower, and whirlpool pump share another circuit. This segmentation allows the drain pump to operate independently when needed, while other components share power through the controller's sequential management, reducing overall wiring complexity while maintaining operational versatility.
3Ease of operation
If power is distributed to the drain pump, then draining function is activated, but power cannot be distributed to whirlpool pump, heater, and air blower simultaneously
Solution Approach 1:
The controller acts as an intermediary between the power source and the drain pump, managing power distribution through intelligent switching. When draining is detected (via automatic sensing or user input), the controller activates the drain pump and deactivates other components, providing a simple user interface that masks the underlying complexity of power management.
Data Source
AI summary
A bathing apparatus comprising a whirlpool pump; a heater; an air blower; a drain pump; and an electric module, wherein the electric module is configured to receive electric power from an electric power line and to distribute electric power to the whirlpool pump, heater, air blower, and drain pump, when electric power is distributed to one of the heater or the air blower, electric power cannot be distributed to the other of the heater or the air blower, and when electric power is distributed to the drain pump, electric power cannot be distributed to the whirlpool pump, the heater, and the air blower.