Rotary Compressor with Direction Control Assembly for Load Adaptation
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Solution Overview
Problem
Ordinary single-stage rotary compressors perform poorly in low temperature environments, and high displacement double-cylinder enhanced vapor injection compressors experience reduced efficiency due to double-cylinder operation under low compression loads, affecting refrigeration cycle system capacity and efficiency.
Innovation Solution
A rotary compressor design featuring a liquid reservoir, a housing with an exhaust port, a compression mechanism with two cylinders and pistons, and a direction control assembly that includes valve ports for efficient refrigerant injection and unidirectional flow, allowing for switching between full load and part load working modes to optimize performance across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high displacement double-cylinder enhanced vapor injection rotary compressor is used, then the capacity of the refrigeration cycle system is improved, but the running efficiency deteriorates under small compression load due to double-cylinder operation
Solution Approach 1:
The patent applies the dynamics principle by enabling the compressor to switch between single-cylinder and double-cylinder operation modes based on load conditions. The direction control assembly allows refrigerant flow to be directed to one or both cylinders, dynamically adapting the compressor's operational configuration to match the compression load and thereby optimizing running efficiency across different operating conditions.
2Device complexity
If an ordinary single-stage rotary compressor is used, then the structure is simple, but the performance becomes too poor to use in low temperature environment
Solution Approach 1:
The patent applies segmentation by dividing the compression function into two separate cylinders, each capable of independent operation. This allows the system to segment the compression load and optimize performance in low temperature environments while maintaining relatively simple individual cylinder designs. The partition plate and direction control assembly enable selective activation of cylinders based on environmental conditions.
Solution Approach 2:
The patent applies universality by designing a multi-functional compressor that can operate in multiple modes: single-cylinder mode for light loads, double-cylinder mode for full load, and selective cylinder activation for low temperature environments. The direction control assembly enables the same physical structure to serve multiple operational purposes, improving adaptability across different operating conditions.
3Productivity
If large-capacity enhanced vapor injection is adopted, then the capacity of the refrigeration cycle system is improved, but the compressor cannot adapt to varying load conditions
Solution Approach 1:
The patent applies dynamics by implementing a load-adaptive control mechanism through the direction control assembly. This assembly dynamically directs refrigerant flow to appropriate cylinders based on real-time compression load conditions, enabling the compressor to transition between single-cylinder and double-cylinder operation modes and thereby adapting to varying load requirements while maintaining high capacity when needed.
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
The design enhances operating efficiency, expands application range, and improves low temperature heating effects by allowing the compressor to adapt to different load conditions, maintaining high performance in both full load and part load scenarios.
Implementation Method 1
a piston disposed inside the cylinder chamber and capable of rolling along an inner wall of the cylinder chamber
Implementation Method 2
a sliding vane movably disposed inside the sliding vane groove, a head portion of the sliding vane abutting against an outer circumferential wall of the piston
Data Source
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AI summary
A rotary compressor (700) and a refrigeration cycle device (1000) having same are provided. The rotary compressor comprises: a liquid reservoir (1), a first direction control assembly (49), and a compression mechanism. The compression mechanism comprises two cylinders and two gas injection holes, in which a sliding vane of one cylinder is pressed against an outer circumferential wall of a piston in the cylinder and a gas injection hole is used for injecting a refrigerant to the cylinder, while the sliding vane of the other cylinder is optionally in contact with or separate from the piston in the cylinder, the other gas injection hole is used for unidirectionally injecting the refrigerant into the cylinder; a first valve port (491) of the first direction control assembly (49) is connected to a gas suction hole of the other cylinder, a second valve port (492) thereof is connected to liquid reservoir (1), a third valve port (493) thereof is in communication with an exhaust hole, and the second valve port (492) and the third port (493) are optionally in communication with the first valve port (491).