Compressor Subassembly with Dual Electrical Control Valves
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Solution Overview
Problem
Conventional refrigerating medium compressors are inefficient in no-load operation due to the requirement for temporary conveying operation to maintain high-pressure conditions, limiting their operational time and efficiency.
Innovation Solution
A subassembly with two electrical control valves and an electrical control device that controls fluid flow between high-pressure, crank chamber pressure, and suction pressure regions, allowing for optimized refrigerant flow management during both conveying and no-load operations by adjusting valve positions based on operational states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional refrigerating medium compressor operates in no-load mode, then the compressor cannot maintain high-pressure conditions, but temporary conveying operation is required to maintain high-pressure conditions, which limits operational time and efficiency
Solution Approach 1:
The patent introduces a control valve as an intermediary component that mediates between the high-pressure chamber and the crank chamber. This valve enables selective connection or disconnection of these chambers, allowing the system to maintain high-pressure conditions even during no-load operation by controlling the refrigerating medium flow path through this intermediary element.
Solution Approach 2:
The control valve is made dynamically adjustable between different positions (open/closed states) based on operational requirements. This dynamic control allows the system to switch between conveying mode and no-load mode while maintaining high-pressure conditions, resolving the contradiction between operational flexibility and pressure maintenance.
2Productivity
If the control valve opens to allow refrigerating medium flow from high-pressure region to crank chamber, then pressure increase in crank chamber reduces conveying volume, but this requires sufficiently high pressure in high-pressure region which is only available during temporary conveying operation
Solution Approach 1:
The control valve operation creates a feedback mechanism where pressure conditions in the high-pressure region are monitored (implicitly through valve positioning) and used to control the valve state. This feedback loop enables the system to automatically adjust conveying volume based on pressure conditions, improving operational efficiency by eliminating the need for temporary conveying operations.
Solution Approach 2:
The control valve enables the system to self-regulate its own pressure conditions and conveying volume without requiring external intervention or temporary conveying operations. The valve automatically maintains high-pressure conditions by controlling the flow path, allowing the compressor to serve itself and eliminate wasteful operational cycles.
3Adaptability or versatility
If a single control valve is used to control refrigerating medium flow, then the system has limited control flexibility, but adding more valves increases device complexity
Solution Approach 1:
The control valve is designed as a multi-functional component that performs multiple control tasks simultaneously. It controls refrigerating medium flow between different chambers, maintains pressure conditions, and enables both conveying and no-load operations through a single valve mechanism. This universal design provides high adaptability without increasing system complexity.
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 solution enhances the efficiency of refrigerating medium compressors by enabling efficient operation during no-load conditions, reducing construction-related disadvantages and improving fuel savings and CO2 reduction by precise torque adaptation and belt tension adjustment.
Implementation Method 1
The first electrical control valve has a valve member arranged within a valve housing and displaceable between a pair of positions
Implementation Method 2
The second electrical control valve has a valve member arranged within a valve housing and displaceable between a pair of positions
Implementation Method 3
The electrical control device is adapted to control, during operation of the compressor, a fluid flow between the high-pressure region and a crank chamber pressure region and between the crank chamber pressure region and the suction pressure region by controlling the positions of the valve members
Data Source
AI summary
A subassembly for a compressor controls a fluid flow of a fluid between a high-pressure region and a crank chamber pressure region and between the crank chamber pressure region and a suction pressure region of the compressor. The subassembly includes a first electrical control valve, a second electrical control valve, and an electrical control device. Each of the first electrical control valve and the second electrical control valve has a valve member arranged within a valve housing and displaceable between a pair of positions. The electrical control device is adapted to control, during operation of the compressor, a fluid flow between the high-pressure region and a crank chamber pressure region and between the crank chamber pressure region and the suction pressure region by controlling the positions of the valve members.