Compressor Capacity Modulation via Piston Valve
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Solution Overview
Problem
Conventional heat pump and refrigeration systems face challenges in efficiently adjusting compressor output to match changing environmental conditions, requiring effective capacity modulation to maintain desired cooling or heating performance.
Innovation Solution
A capacity modulation system for compressors, featuring a valve apparatus with a piston and control pressure passage, allowing or prohibiting fluid flow by moving the piston relative to a valve opening, utilizing pressurized fluid to bias the piston and control fluid communication through the compressor, including a pressure-responsive valve member and solenoid valve for high or low control pressure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional capacity modulation systems are used to adjust compressor output, then the system can adapt to changing environmental conditions, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The piston is biased by pressurized fluid from the system itself rather than requiring external control systems. The control fluid from the system automatically moves the piston to modulate capacity, making the system self-regulating and reducing external control complexity
Solution Approach 2:
The patent uses pneumatic control where pressurized fluid from the refrigeration system itself is utilized to move the piston and modulate compressor capacity. This eliminates the need for complex electrical or mechanical control systems by leveraging the system's own fluid pressure
2Reliability
If capacity modulation is implemented to maintain performance under varying loads, then cooling or heating performance is maintained, but power consumption increases due to additional control components
Solution Approach 1:
The system uses its own operating fluid pressure to drive the modulation mechanism, eliminating the need for separate power sources or control motors. The pressurized fluid from normal system operation performs the work of moving the piston, requiring no additional energy input
Solution Approach 2:
The patent replaces complex mechanical or electrical control systems with a simple pneumatic actuation mechanism. The control fluid pressure directly moves the piston without requiring motors, sensors, or complex control circuits, thereby reducing power consumption
3Measurement precision
If a piston-based valve mechanism is used to control fluid flow, then flow control precision is improved, but the device complexity increases due to additional valve components
Solution Approach 1:
The patent combines the valve function and flow control into a single integrated piston mechanism. The piston itself acts as the valve element that modulates fluid flow to the compressor, eliminating the need for separate valve components and reducing overall device complexity while maintaining precise flow control
Solution Approach 2:
The piston serves multiple functions simultaneously: it acts as both the flow control element and the capacity modulation mechanism. This multi-functional design reduces the number of separate components needed while achieving precise flow control and capacity adjustment
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
Enables efficient adjustment of compressor output to match varying environmental conditions, improving the system's ability to maintain performance across a wide range of loading conditions, extending the lifespan of components and reducing power consumption.
Implementation Method 1
A seal may be disposed between the piston and the cylinder and may include a seal chamber receiving pressurized fluid therein to bias the piston into the first position
Implementation Method 2
A seal may be disposed between the piston and the cylinder and may include a seal chamber receiving pressurized fluid therein to bias the piston into the first position
Implementation Method 3
A valve mechanism may be in fluid communication with the cylinder and may selectively supply pressurized fluid to the cylinder to move the piston against a force applied on the piston by the pressurized fluid disposed within the seal chamber
Data Source
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AI summary
An apparatus is provided and may include a compression mechanism, a valve plate associated with the compression mechanism and having at least one port in fluid communication with the compression mechanism, and a manifold disposed adjacent to the valve plate. A cylinder may be formed in the manifold and a piston may be disposed within the manifold and may be movable relative to the manifold between a first position separated from the valve plate and a second position engaging the valve plate. A valve element may be disposed within the piston and may be movable relative to the piston and the manifold. The valve element may be movable between an open position spaced apart from the valve plate and permitting flow through the port and into the compression mechanism and a closed position engaging the valve plate and restricting flow through the port and into the compression mechanism.