Wireless HVAC Actuator Configuration for Remote Diagnostics
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Solution Overview
Problem
Conventional actuators in building automation systems face challenges in configuring and communicating, especially when access is restricted or the master-slave configuration is unclear, and require physical access for tasks like programming and diagnostics.
Innovation Solution
The actuator includes a mechanical transducer, input data connection, feedback data connection, and processing circuit that uses a master-slave detection signal to select operating modes and engage in bi-directional communications, allowing wireless configuration and operation without physical access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If physical switches (e.g., detent potentiometer) are attached to actuators for configuring master-slave operation, then the actuators can be configured to operate in master or slave mode, but it becomes challenging to properly configure tandem-mounted actuators when access is restricted or proper configuration is unclear
Solution Approach 1:
The patent replaces mechanical configuration switches (detent potentiometer) with electronic communication between actuators. The actuators automatically determine master-slave roles through electrical signal exchange on the feedback data connection, eliminating the need for physical switch manipulation and enabling remote configuration without restricted access issues.
Solution Approach 2:
The actuators perform self-configuration by automatically detecting their roles in the tandem arrangement through communication signals. Each actuator autonomously determines whether it should operate as master or slave based on the signals received from the other actuator, eliminating the need for manual external configuration.
2Ease of repair
If physical access to control devices is required for programming, setting addresses, installing firmware, and diagnostics, then these tasks can be performed, but it becomes difficult to access control devices mounted in confined spaces or sealed from the external environment
Solution Approach 1:
The patent replaces physical access requirements with wireless communication capabilities. The actuator includes a wireless transceiver that enables programming, diagnostics, and configuration tasks to be performed remotely without opening sealed enclosures or accessing confined spaces, while still allowing full access to device functions.
Solution Approach 2:
The wireless transceiver acts as an intermediary between the external world and the sealed actuator. It provides a communication channel that penetrates the physical barrier of the sealed enclosure, allowing data and commands to be transmitted without physical access to the device interior.
3Reliability
If actuators are arranged in tandem with physical switches for configuration, then master-slave configuration can be achieved, but the configuration process becomes unclear and challenging when access is restricted
Solution Approach 1:
The patent implements automatic feedback communication between actuators to determine and confirm master-slave roles. Each actuator sends and receives detection signals through the feedback data connection, automatically establishing the configuration without ambiguity. LED indicators provide visual feedback to confirm the established roles, eliminating configuration uncertainty.
Data Source
AI summary
An actuator in a HVAC system includes a mechanical transducer, a processing circuit, a wireless transceiver, and a power circuit. The processing circuit includes a processor and memory and is configured to operate the mechanical transducer according to a control program stored in the memory. The wireless transceiver is configured to facilitate bidirectional wireless data communications between the processing circuit and an external device. The power circuit is configured to draw power from a wireless signal received via the wireless transceiver and power the processing circuit and the wireless transceiver using the drawn power. The processing circuit is configured to use the power drawn from the wireless signal to wirelessly transmit data stored in the memory of the actuator to the external device via the wireless transceiver, wirelessly receive data from the external device via the wireless transceiver, and store the data received from the external device in the memory.