Hermetic Compressor Ferromagnetic Exhaust Valve Restraint
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Solution Overview
Problem
Hermetic compressors face issues with exhaust valve adhesion to the restrainer due to refrigerant lubricant, leading to reduced operational efficiency and increased response time.
Innovation Solution
A hermetic compressor design featuring a ferromagnetic restrainer with a magnetic circuit that induces ferromagnetism, creating a magnetic attraction between the restrainer and exhaust valve to overcome adhesion, along with a dielectric seal and fastening means to prevent electrical conductivity, and a varying current circuit to adapt to changing cooling needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal is placed between the exhaust valve and restrainer to prevent adhesion, then adhesion is reduced, but electrical conductivity between the restrainer and exhaust valve occurs
Solution Approach 1:
A magnetic circuit is introduced as an intermediary component between the restrainer and exhaust valve. This magnetic circuit provides a non-conductive path that maintains the magnetic field necessary for adhesion prevention while blocking electrical current flow, thus resolving the contradiction between preventing adhesion and avoiding electrical conductivity.
Solution Approach 2:
The material properties of the seal are changed to be non-conductive while maintaining sealing functionality. By selecting materials with appropriate magnetic and electrical properties, the seal can prevent adhesion through maintaining the magnetic field while simultaneously blocking electrical conductivity.
2Reliability
If the restrainer is electrified to create magnetic attraction and prevent adhesion, then adhesion is overcome, but energy consumption increases
Solution Approach 1:
Instead of continuous electrification, the system uses periodic or pulsed electrical current to the restrainer. The magnetic field is activated only when needed to prevent adhesion, allowing the system to conserve energy while maintaining reliable adhesion prevention functionality.
Solution Approach 2:
The magnetic circuit and seal configuration allows the system to maintain the magnetic field with minimal energy input. Once the magnetic field is established, it self-sustains to prevent adhesion without requiring continuous high energy input, reducing overall energy consumption.
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 magnetic attraction effectively prevents adhesion, improving operational efficiency and responsiveness of the exhaust valve, enhancing energy efficiency and reducing the negative effects of lubricant densification over time.
Implementation Method 1
The hermetic compressor of the present invention further comprises a circuit that is used to provide an electrical current to the restrainer, inducing ferromagnetism on the restrainer
Implementation Method 2
This creates a magnetic attraction between the restrainer and the exhaust valve, thereby creating an attraction between the restrainer and the exhaust valve
Implementation Method 3
The hermetic compressor of the present invention further comprises a seal placed in between the exhaust valve and the restrainer so as to electrically insulate the said parts from each other
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The present invention relates to a hermetic compressor (1) comprising; a housing (2), a cylinder (3) inside the housing (2) and that enables the refrigerant to be sucked and pumped; a piston (4) that is operated in the cylinder (3); a body that supports the cylinder (3) and the piston (4); a cylinder head (5) that enables the refrigerant sucked and pumped by the movement of the piston (4) into the cylinder (3) to be guided; an exhaust chamber (6) that is disposed in the cylinder head (5) wherein the refrigerant fluid pumped during the compression movement of the piston (4) is accumulated; a valve table (7) placed between the cylinder (3) and the cylinder head (5); an exhaust port (8) arranged on the valve table (7) that enables the refrigerant to pass from the cylinder (3) to the exhaust chamber (6) during the compression movement of the piston (4); an exhaust valve (9) disposed on the valve table (7) that opens and closes the exhaust port (8); a restrainer (10) fixed onto the valve table (7) that extends into the exhaust chamber (6) and that restrains the movement of the exhaust valve (9), wherein the exhaust valve (9) and the restrainer (10) are produced from a ferromagnetic material.