HVAC Flow-Rate Feedback Control for Pump and Compressor Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing air-conditioning systems face challenges in achieving accurate control and energy efficiency due to the lack of consideration for system configuration attributes like pipe length, pressure loss, and indoor unit capacity, leading to reduced operating efficiency and inability to achieve energy savings.
Innovation Solution
The proposed air-conditioning system includes a heat-source device, a relay device, and multiple indoor units connected via refrigerant and heat medium circuits, with a flow rate detection unit and controller that adjusts the operation of the compressor or pump based on detected flow rate information, enhancing control accuracy and energy savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the opening degree of the flow control valve is set based on fixed pump pressure control, then the control method is simple, but the control accuracy decreases and operating efficiency is reduced
Solution Approach 1:
The patent implements feedback control by detecting the actual flow rate of the heat medium and using this information to adjust the compressor or pump operation. The flow rate detection unit provides real-time feedback about system conditions, allowing the controller to optimize performance based on actual operating parameters rather than fixed settings.
Solution Approach 2:
The patent replaces simple mechanical pressure-based control with an intelligent control system that uses flow rate detection and electronic control algorithms. This substitution of mechanical control with electronic sensing and control enables more precise adjustment of system parameters based on actual flow conditions.
2Ease of operation
If the flow control valve opening is adjusted without considering system configuration, then the system is easier to operate, but energy saving cannot be achieved
Solution Approach 1:
The patent makes the control system dynamic by continuously monitoring flow rate and adjusting compressor or pump operation accordingly. Instead of static fixed-settings, the system adapts its operation in real-time based on actual flow conditions, enabling energy optimization without requiring user intervention or system knowledge.
Solution Approach 2:
The system performs self-optimization by automatically detecting flow rate and adjusting its own operation parameters. The controller autonomously determines the optimal operating point for the compressor or pump based on detected flow conditions, eliminating the need for manual adjustment while achieving energy savings.
3Device complexity
If fixed pump pressure control is used, then the device complexity is low, but the operating efficiency is reduced
Solution Approach 1:
The flow rate detection unit provides continuous feedback about actual system performance, enabling the controller to optimize compressor or pump operation in real-time. This feedback mechanism allows the system to maintain high operating efficiency without requiring complex manual intervention or system configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the accuracy of control in the entire system, enabling energy savings by optimizing the operation of the compressor or pump according to system-specific flow rate variations.
Implementation Method 1
a flow rate detection unit configured to detect flow rate information associated with a flow rate of a heat medium that flows through each of the plurality of indoor units
Implementation Method 2
a heat-source device that includes a compressor and a heat-source-side heat exchanger; a relay device that includes a pump and an intermediate heat exchanger
Implementation Method 3
a heat-source device that includes a compressor
Implementation Method 4
a relay device that includes a pump
Data Source
AI summary
An air-conditioning system includes a heat-source device that includes a compressor and a heat-source-side heat exchanger, a relay device that includes a pump and an intermediate heat exchanger, and a plurality of indoor units that each include a load-side heat exchanger. The air-conditioning system includes a refrigerant circuit through which refrigerant circulates and a heat medium circuit through which a heat medium circulates. The air-conditioning system includes a flow rate detection unit configured to detect flow rate information associated with a flow rate of a heat medium that flows through each of the plurality of indoor units and a controller configured to control the compressor and the pump. The controller controls operation of at least either the compressor or the pump on the basis of the flow rate information detected by the flow rate detection unit.