HVAC system having electrical switch for supplying power to a fan and a compressor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing HVAC systems are unable to initiate operation under certain conditions, such as high ambient conditions, leading to delayed supply of conditioned air due to the interruption of compressor and fan operation by pressure switches.
Innovation Solution
A control system with an improved wiring arrangement that separately directs electrical signals to the compressor and fan motor in parallel, allowing independent operation of these components, thereby reducing the likelihood of pressure switch interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure switch is used to control compressor operation, then compressor safety is improved, but system reliability deteriorates because the fan also stops operating
Solution Approach 1:
The patent segments the control circuits for the compressor and fan into separate parallel paths. The first electrical circuit directs current from the pressure switch to the compressor, while the second electrical circuit directs current from the same pressure switch to the fan. This segmentation allows the fan to continue operating even when the pressure switch interrupts the compressor circuit, resolving the contradiction by maintaining system reliability while ensuring continuous conditioned air supply.
2Device complexity
If the compressor and fan share a common electrical circuit, then device complexity is reduced, but loss of time increases due to simultaneous shutdown
Solution Approach 1:
The patent divides the electrical circuit into two separate parallel circuits that branch from a common electrical source. The first circuit connects to the compressor and the second circuit connects to the fan. This segmentation allows independent control of each component, enabling the fan to continue running during pressure switch interruptions while maintaining relatively simple overall circuit design, thus reducing time loss without significantly increasing complexity.
Solution Approach 2:
The fan is kept in a ready state through the preliminary establishment of a separate electrical circuit that can be quickly activated. When the pressure switch interrupts the compressor circuit, the fan circuit is already in place and can immediately take over the cooling function, preventing delays in conditioned air supply while the compressor is interrupted.
3Use of energy by moving object
If the electrical circuit is configured to stop both compressor and fan on pressure switch activation, then energy consumption is reduced, but productivity deteriorates
Solution Approach 1:
The patent segments the electrical load control by creating separate parallel circuits for the compressor and fan. When the pressure switch activates, it can selectively interrupt the compressor circuit while leaving the fan circuit active. This allows the system to reduce energy consumption by stopping the high-power compressor while maintaining minimal productivity through continued fan operation, which sustains air flow and prepares the system for rapid resume.
Data Source
AI summary
A control system for a heating, ventilation, and air conditioning (HVAC) system includes an electrical switch configured to close and enable supply of power to a compressor of the HVAC system based on receipt of an electric current, a first electrical circuit configured to direct the electric current to the electrical switch, and a second electrical circuit configured to direct the electric current to bypass the electrical switch and direct the electric current toward a fan controller of the HVAC system.