Refrigeration system with integrated air conditioning by parallel solenoid valves and check valve
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Solution Overview
Problem
Conventional refrigeration systems require separate components and energy to cool both refrigeration loads and air conditioning systems, leading to inefficiencies and increased resource consumption.
Innovation Solution
An integrated refrigeration and air conditioning system using parallel solenoid valves, a check valve, and a heat exchanger, where the refrigerant from the refrigeration system is used to cool the air conditioning system, reducing the number of components and energy consumption by redirecting a portion of the refrigerant flow through a heat exchanger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate components are used to cool refrigeration loads and air conditioning systems, then each system can be independently controlled, but the number of components increases and energy consumption increases
Solution Approach 1:
The patent combines the refrigeration system and air conditioning system into a single integrated system. The refrigerant from the refrigeration system is redirected through a heat exchanger to cool the air conditioning system, merging two previously separate cooling functions into one unified system that shares common components such as the compressor, condenser, and refrigerant circulation pathways.
Solution Approach 2:
The refrigeration system is designed to perform multiple functions: it cools both the refrigeration loads (via the flash tank and evaporators) and the air conditioning system (via the heat exchanger). The refrigerant serves dual purposes by being used directly for refrigeration and indirectly for air conditioning through heat exchange, making the system universal in its cooling capability.
2Adaptability or versatility
If separate components are used to cool refrigeration loads and air conditioning systems, then each system can be independently controlled, but energy consumption increases
Solution Approach 1:
The air conditioning system is cooled using the refrigerant from the refrigeration system itself, without requiring an additional independent cooling system. The refrigeration system's refrigerant serves the air conditioning load as well, allowing the system to serve itself and eliminate the need for separate energy-consuming equipment for air conditioning.
Solution Approach 2:
By merging the refrigeration and air conditioning systems, the patent eliminates duplicate components such as separate compressors, condensers, and expansion devices. The integrated system uses a single refrigerant circulation loop that serves both functions, significantly reducing the total energy consumption compared to two separate systems operating independently.
3Device complexity
If refrigerant flow is redirected through a heat exchanger, then the number of components is reduced and energy consumption decreases, but the refrigeration system requires integrated control mechanisms
Solution Approach 1:
The system incorporates dynamic control mechanisms including solenoid valves that can open or close based on system conditions, and a check valve that allows refrigerant flow in one direction while preventing backflow. These dynamic components enable the system to automatically adjust refrigerant distribution between the flash tank and heat exchanger based on cooling demands, providing the necessary automation for the integrated system.
Solution Approach 2:
The integrated system uses feedback control through temperature sensors and pressure sensors that monitor the state of the refrigerant and system conditions. This feedback information is used by the controller to adjust the solenoid valves and other components, ensuring that both the refrigeration and air conditioning functions are maintained at optimal levels despite the shared components.
4Device complexity
If refrigerant flow is redirected through a heat exchanger, then the number of components is reduced, but pressure control becomes more complex
Solution Approach 1:
The refrigeration system is segmented into distinct pressure zones: a high-pressure side (compressor, condenser) and a low-pressure side (flash tank, evaporators). The solenoid valves are strategically positioned to control refrigerant flow between these segmented pressure zones, allowing independent pressure control in each zone while using fewer overall components than a fully integrated single-pressure system would require.
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 integration reduces the number of components, energy expenditure, and resources needed to maintain two separate systems, while efficiently providing cooling for both refrigeration loads and air conditioning, using natural refrigerants like carbon dioxide to enhance environmental sustainability.
Implementation Method 1
one or more solenoid valves coupled to the flash tank, where the one or more solenoid valves are configured to reduce a pressure of the first refrigerant flowing from the flash tank to the first heat exchanger
Implementation Method 2
the first heat exchanger may be configured to receive an amount of the first liquid refrigerant from the one or more solenoid valves, receive a second refrigerant from the air conditioning system, where the second refrigerant is associated with an air conditioning load, and provide cooling to the second refrigerant, using the first refrigerant
Implementation Method 3
a check valve coupled to the flash tank, where the check valve configured to reduce a pressure of the first vapor refrigerant flowing from the flash tank away from the one or more solenoid valves
Data Source
AI summary
A system includes a heat exchanger coupled to an air conditioning system, and a flash tank is coupled to refrigeration cases, and houses a first refrigerant. The system includes solenoid valves coupled to the flash tank, where the solenoid valves reduce a pressure of the first refrigerant flowing from the flash tank to the heat exchanger. The heat exchanger may be coupled to the solenoid valves, and the heat exchanger may be configured to receive an amount of the first refrigerant from the solenoid valves, receive a second refrigerant from the air conditioning system, where the second refrigerant is associated with an air conditioning load, and provide cooling to the second refrigerant, using the first refrigerant. Finally, the system includes a check valve coupled to the flash tank, where the check valve reduces a pressure of the first refrigerant flowing from the flash tank away from the solenoid valves.