Remote access control of HVAC system
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Solution Overview
Problem
Technicians performing HVAC system installation and maintenance often struggle to observe and address events occurring at the system when they are not physically present, as existing systems lack remote access control mechanisms to ensure the technician's proximity.
Innovation Solution
Implementing a system that uses GPS to verify the user's location relative to the HVAC system, granting access to settings and controls only when the user is within a predetermined distance, thereby ensuring the technician can observe and address issues in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If remote access to HVAC system settings is allowed, then technician productivity is improved, but system security and operational reliability deteriorate due to inability to verify technician proximity
Solution Approach 1:
The system continuously receives location data from the technician's mobile device and compares it against the HVAC system location, providing real-time feedback on proximity status. This feedback mechanism enables dynamic access control that maintains security while allowing remote work when physically present at the equipment location.
Solution Approach 2:
A location verification intermediary system is introduced between the technician and HVAC system access. This intermediary verifies the technician's physical proximity through GPS or other location services before granting access to system settings, thereby maintaining security protocols while enabling remote capability.
2Reliability
If technician must be physically present at HVAC system, then system reliability is improved through direct observation, but technician productivity deteriorates due to inability to perform tasks remotely
Solution Approach 1:
The access control system transitions from a static requirement (physical presence always required) to a dynamic system that verifies proximity only when access is needed. The system adapts access permissions based on real-time location verification, allowing technicians to work remotely while maintaining presence verification protocols.
Solution Approach 2:
The patent replaces the mechanical requirement of physical presence with an electronic location verification system. Instead of requiring the technician to be physically at the HVAC unit, the system uses GPS coordinates, Wi-Fi triangulation, or other electronic location services to verify proximity, thereby maintaining reliability requirements while enabling remote productivity.
3Reliability
If location verification system is implemented, then access control reliability is improved, but device complexity increases due to additional verification mechanisms
Solution Approach 1:
The system leverages the mobile device's existing location capabilities (GPS, Wi-Fi positioning, cellular triangulation) that are already present in smartphones and tablets. By utilizing these universal location services rather than implementing a dedicated verification device, the system achieves reliable access control without significantly increasing overall system complexity.
Solution Approach 2:
The technician's mobile device performs the location verification function using its own built-in GPS and positioning capabilities. The HVAC system simply receives the location data and makes access decisions, rather than requiring complex verification hardware at the HVAC unit. This self-service approach maintains reliability while minimizing added complexity.
Data Source
AI summary
A non-transitory computer-readable storage medium for a heating, ventilation, and/or air conditioning (HVAC) system includes instructions that, when executed by a processor, cause the processor to receive an input indicative of a user location, perform a verification that the user location is within a determined distance from the HVAC system, and control access to system settings of the HVAC system based on the verification.