Integrated EC Window Controller for Simplified IGU Installation
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Solution Overview
Problem
Conventional electrochromic window controllers are remotely located, leading to issues with varying wire lengths, increased installation complexity and cost, and potential mismatches between controllers and windows, which hinder the commercial adoption of electrochromic devices.
Innovation Solution
Localized controllers are integrated into the window assembly, eliminating the need for external matching and reducing wiring complexity by being part of the IGU or window frame, featuring a power converter, communication circuit, microcontroller, and driver circuit for independent control of multiple EC panes, with wireless communication and power capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional remote controllers are used for EC windows, then control functionality is provided, but wire length varies between windows and controllers leading to increased installation complexity and cost
Solution Approach 1:
The controller is merged with the IGU assembly, forming an integrated unit where the controller becomes part of the window structure itself. This eliminates the need for separate remote controller installations and varying wire connections, as the controller is now inherently positioned within the window assembly at the optimal location for each EC pane.
2Ease of manufacture
If remote controllers are used for EC windows, then control functionality is provided, but mismatches between controllers and windows occur requiring field installation matching
Solution Approach 1:
The controller is pre-integrated into the IGU assembly during manufacturing, establishing the correct controller-window match before installation. This preliminary integration ensures that each controller is permanently associated with its corresponding EC pane configuration, eliminating field matching issues and ensuring reliable operation from installation day.
3Ease of operation
If localized controllers are integrated into IGU, then wiring complexity is reduced and installation is simplified, but controller must fit within limited IGU space
Solution Approach 1:
The controller components are distributed and positioned at specific locations within the IGU assembly where space is available, such as within the sealant layers or frame structures. This localized placement allows the controller to fit within the limited IGU space while maintaining all necessary control functions for the EC panes.
Data Source
AI summary
Onboard EC window controllers are described. The controllers are configured in close proximity to the EC window, for example, within the IGU. The controller may be part of a window assembly, which includes an IGU having one or more EC panes, and thus does not have to be matched with the EC window, and installed, in the field. The window controllers described herein have a number of advantages because they are matched to the IGU containing one or more EC devices and their proximity to the EC panes of the window overcomes a number of problems associated with conventional controller configurations.