Scroll Compressor Injection Port Layout for Higher Refrigerant Flow
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Solution Overview
Problem
Existing scroll compressors face limitations in refrigerant flow rate and cooling/heating performance, especially under extreme external temperatures, due to inadequate positioning of refrigerant injection holes relative to the suction port, leading to reduced efficiency and increased manufacturing costs.
Innovation Solution
A scroll compressor design with strategically positioned first and second inflow parts, where the first inflow part opens before suction completion and the second inflow part opens later, optimizing refrigerant injection timing and pressure differences to enhance flow rate, with the first inflow part positioned at a 80° to 110° angle opposite to the rotation direction and the second at a 70° to 100° angle in the rotation direction, creating a phase difference of 180°.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compressor with large capacity is provided to improve cooling/heating performance under extreme temperatures, then the cooling and heating performance is improved, but the manufacturing and installation cost increases
Solution Approach 1:
The invention changes the parameters of refrigerant injection by providing multiple injection ports at different positions and timings. The first injection port injects refrigerant during the suction stroke when cylinder pressure is low, while the second injection port injects refrigerant during the compression stroke when cylinder pressure is high. This parameter variation in injection timing and position allows efficient refrigerant injection without requiring a larger compressor capacity, thus improving cooling/heating performance without increasing manufacturing costs.
2Device complexity
If refrigerant injection is performed through simply provided injection ports without specialized positioning, then the device complexity is low, but the refrigerant flow rate and injection efficiency are reduced
Solution Approach 1:
The invention applies local quality by positioning injection ports at specific locations within the compressor cylinder. The first injection port is positioned to inject refrigerant during the suction stroke when the piston is moving downward, while the second injection port is positioned to inject refrigerant during the compression stroke when the piston is moving upward. This localized positioning optimizes refrigerant injection at different stages of the compression cycle, significantly improving refrigerant flow rate and injection efficiency without substantially increasing device complexity.
3Duration of action of moving object
If the injection hole is formed in a position to inject refrigerant early before suction completion, then the injection timing is extended, but the inner pressure of suction chamber increases to reduce suction refrigerant flow rate
Solution Approach 1:
The invention applies preliminary action by providing a first injection port that injects refrigerant into the cylinder during the suction stroke, before the compression stroke begins. This preliminary refrigerant injection prepares the cylinder with additional refrigerant charge while the suction valve is still open or just closing, allowing the system to benefit from extended injection timing without significantly increasing suction chamber pressure, as the suction valve provides a pressure relief path.
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 design increases the refrigerant flow rate and improves cooling/heating performance by optimizing the injection timing and pressure differences within the compressor, reducing the power required for compression and enhancing efficiency.
Implementation Method 1
a first inflow part disposed on one side of the fixed scroll to inject the refrigerant into the compression chamber and a second inflow part disposed on the other side of the fixed scroll to inject a refrigerant, which has a pressure different from that of the refrigerant introduced into the first inflow part, into the compression chamber
Implementation Method 2
an orbiting scroll disposed to have a phase different with respect to the fixed scroll, the orbiting scroll including a second wrap defining a compression chamber that is rotatable between the first wrap and the second wrap
Data Source
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AI summary
Provided are a scroll compressor (10) and an air conditioner (1) including the same. The scroll compressor (10) includes a motor (160) generating a driving force, a driving shaft (150) passing through the motor to rotate, a main frame(140) supporting an upper portion (150) of the driving shaft, a fixed scroll (120) including at least one coupling part coupled to the main frame and a first wrap (123), an orbiting scroll (130) disposed to have a phase different with respect to the fixed scroll, the orbiting scroll including a second wrap (132) defining a compression chamber that is rotatable between the first wrap (123) and the second wrap (132), a suction part (111) suctioning a refrigerant into the compression chamber, a first inflow part (81) disposed on one side of the fixed scroll (120) to inject the refrigerant into the compression chamber, and a second inflow part (91) disposed on the other side of the fixed scroll (120) to inject a refrigerant, which has a pressure different from that of the refrigerant introduced into the first inflow part, into the compression chamber. The first inflow part (81) is disposed at a position at which a first extension line (l1) connecting a central portion of the fixed scroll (120) to a central portion of the suction part (111) rotates by a first preset angle in a direction opposite to the rotation direction of the compression chamber.