Sliding Vane Compressor Bottom Exhaust Structure
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Solution Overview
Problem
Current sliding vane type compressors have a smaller effective exhaust area and higher exhaust resistance, leading to lower energy efficiency and increased power consumption due to structural constraints and a large clearance volume, resulting in wasted energy as remaining gas is not effectively discharged.
Innovation Solution
The compressor features a vent hole and guiding passage that allow direct exhaust of compressed refrigerant from the compression cavity, eliminating the need for a side exhaust port and exhaust valve disc, thereby increasing the effective exhaust area and reducing power consumption by equalizing exhaust pressure with back pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a side exhaust port and exhaust valve disc are provided at a side of the air cylinder, then the compressor can ensure normal operation under various working conditions, but the effective exhaust area is smaller and exhaust resistance is larger, leading to lower energy efficiency
Solution Approach 1:
The invention extracts the exhaust function from the traditional side exhaust port structure and relocates it to the bottom of the air cylinder. This creates a separate exhaust passage that is independent from the compression cavity, allowing the exhaust port to have a larger effective area without being constrained by the cylinder wall thickness or positioning requirements of the side exhaust structure.
Solution Approach 2:
The invention changes the spatial dimension of the exhaust port from a side-mounted configuration (constrained by cylindrical geometry) to a bottom-mounted configuration. This dimensional change allows the exhaust port to be positioned at the lowest point of the compression cavity, utilizing gravity for refrigerant drainage, and provides access to a larger effective exhaust area at the base of the cylinder.
2Reliability
If an exhaust valve disc is provided to prevent overpressure in low load working condition, then overpressure protection is achieved, but the compressor must overcome the rigidity of the exhaust valve disc during exhaust, increasing power consumption
Solution Approach 1:
The invention extracts the overpressure protection function from the exhaust valve disc and relocates it to a dedicated pressure relief valve positioned at the bottom exhaust passage. This separate pressure relief valve operates independently from the main exhaust process, eliminating the need to overcome valve disc rigidity during normal exhaust operations and reducing power consumption.
Solution Approach 2:
The invention introduces a separate pressure relief valve as an intermediary component for overpressure protection. This pressure relief valve is specifically designed to handle overpressure conditions in low-load working scenarios, while the main exhaust valve can operate with minimal resistance. The intermediary pressure relief valve absorbs the stress of overpressure events without affecting the efficiency of the primary exhaust process.
3Ease of manufacture
If a large clearance volume exists in the exhaust port, then the exhaust port structure is simple, but the remaining gas cannot be discharged from the pump body, causing it to expand to a lower pressure chamber and repeat compression, wasting power consumption
Solution Approach 1:
The invention introduces a drainage hole at the bottom of the compression cavity that dynamically drains remaining refrigerant during the compression process. This drainage mechanism is active and adaptive, allowing the system to clear residual gas from the clearance volume and prevent it from being re-compressed, thereby reducing energy waste while maintaining structural simplicity.
Solution Approach 2:
The invention creates a secondary exhaust pathway through the bottom exhaust passage that mirrors and supplements the traditional side exhaust function. This bottom exhaust passage specifically targets the drainage of remaining gas from the clearance volume, effectively copying the exhaust function but optimizing it for complete gas removal. The dual-pathway system ensures that both the main compression gas and the residual clearance gas are efficiently discharged.
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 enhances energy efficiency and reduces manufacturing costs by minimizing exhaust loss and clearance volume, ensuring complete discharge of refrigerant without overcoming the rigidity of an exhaust valve disc, thus optimizing the compressor's performance.
Implementation Method 1
the compressed refrigerant could enter into the vent hole directly from the compression cavity and then be exhausted
Implementation Method 2
the exhaust pressure is equal to back pressure, effectively reducing power consumption
Data Source
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AI summary
Disclosed are a sliding vane compressor and an exhaust structure thereof. The exhaust structure of the sliding vane compressor comprises : an exhaust hole (10), the exhaust hole (10) being formed in a flange of the sliding vane compressor and being in communication with a compression cavity (51) of a cylinder of the sliding vane compressor; a guide channel (20), the guide channel (20) being formed on the flange and penetrating through the flange; and an exhaust channel (30), the exhaust channel (30) being formed on an eccentric circle (60) of the sliding vane compressor, and the exhaust channel being used for communicating the compression cavity (51) with the guide channel (20) using the rotation of the eccentric circle (60). The sliding vane compressor and the exhaust structure thereof have a small exhaust loss, thereby effectively reducing the power consumption and the production and manufacturing costs of the sliding vane compressor.