Scroll Compressor Vacuum Prevention Valve Block
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Solution Overview
Problem
Conventional scroll compressor vacuum prevention apparatuses face issues with burrs and foreign materials obstructing the sliding valve operation, increased production costs due to complex processing, and inefficiencies from inaccurate valve hole dimensions leading to refrigerant leakage.
Innovation Solution
A vacuum prevention apparatus with a bypass hole and valve member that connects the suction and discharge chambers, featuring a valve block with a penetratingly formed inner channel to prevent backflow and simplify processing, reducing the risk of burrs and foreign materials, and enhancing the reliability and efficiency of the compressor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional vacuum preventing apparatus uses a sliding valve with a concaved valve hole, then the bypass channel can connect suction and discharge chambers, but burrs and foreign materials remain in the valve hole obstructing valve operation
Solution Approach 1:
The patent divides the vacuum preventing apparatus into separate functional components: a valve block with penetrating inner channels and a sliding valve. The valve block contains the bypass hole and inner channels, while the sliding valve merely opens and closes the flow path. This segmentation allows the valve block to be processed separately with precise penetrating channels that prevent burr formation, while the sliding valve operates smoothly without being contaminated by processing residues.
Solution Approach 2:
The patent extracts the problematic concaved valve hole structure and replaces it with a valve block containing penetrating inner channels. By removing the concaved structure that traps burrs, the design eliminates the source of obstruction while maintaining the bypass functionality. The sliding valve is separated from the valve hole formation process, taking out the contradiction between connection functionality and operational smoothness.
2Ease of manufacture
If the valve hole is mechanically processed with complex shaping, then the bypass channel can be formed, but production costs increase due to complex processing
Solution Approach 1:
The patent segments the manufacturing process into simple penetrating channel formation in the valve block and separate sliding valve assembly. The inner channels are formed as straight penetrating passages through the valve block, which can be accomplished with simple drilling or punching operations rather than complex concaved hole shaping. This segmentation dramatically reduces processing complexity while maintaining the bypass channel functionality.
3Ease of manufacture
If the valve hole dimensions are inaccurately controlled, then the bypass channel can be formed, but refrigerant leakage occurs
Solution Approach 1:
The patent separates the valve block (containing precisely formed penetrating inner channels) from the sliding valve component. The penetrating inner channels in the valve block can be formed with high dimensional accuracy using standard precision machining or punching processes, ensuring consistent bore dimensions that prevent refrigerant leakage. The sliding valve then simply fits into this precisely formed opening, eliminating the need for complex dimensional control in a single integrated valve hole.
4Adaptability or versatility
If a sliding valve is used to open and close the bypass channel, then the suction and discharge chambers can be connected when needed, but burrs obstruct the sliding valve operation
Solution Approach 1:
The patent extracts the sliding valve from the valve hole structure, placing it in a separate functional role. The valve block contains the bypass hole and precisely formed penetrating inner channels that guide refrigerant flow. The sliding valve is a separate component that simply moves to open or close the connection between the bypass hole and inner channels. This extraction ensures that burrs from channel formation remain in the valve block's internal passages rather than obstructing the sliding valve's movement 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
The solution ensures smooth operation of the sliding valve, reduces production costs, and improves the compressor's efficiency by preventing burrs and foreign materials from obstructing the refrigerant channel, while simplifying the fabrication process and reducing defective proportions.
Implementation Method 1
an elastic member (153) supported at an upper surface of the valve member (152) for pushing the valve member (152) so as to close the inner channel when a pressure of the compression chamber is higher than atmospheric pressure
Implementation Method 2
for introducing a discharged refrigerant to the compression chamber by connecting the discharge chamber of a high pressure to the suction chamber of a low pressure when a pressure of the compression chamber is lowered into a pressure less than atmospheric pressure
Data Source
AI summary
An apparatus for preventing vacuum of a scroll compressor is provided. The apparatus includes a fixed scroll having a bypass hole, through which a suction chamber of a casing is connected to a discharge chamber of the casing; a valve block having an inner channel, through which the bypass hole of the fixed scroll is connected to the discharge chamber of the casing, and fixedly installed at the fixed scroll; and a valve member disposed between the bypass hole of the fixed scroll and the inner channel of the valve block. Since the apparatus is assembled at an outer periphery of the fixed scroll, a processing error of the fixed scroll is prevented, thereby reducing production costs. Also, since foreign materials generated when a refrigerant channel is processed do not remain in a valve hole, the valve member is prevented from being mal-operated, productivity is enhanced, and fabrication costs reduced.