Freon refilling apparatus for vehicles
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Solution Overview
Problem
Existing Freon refilling apparatuses require separate devices for gas cylinders with diaphragms and valve cores, leading to poor ease of use and high operating costs, as well as issues with gas leakage and environmental pollution.
Innovation Solution
A universal Freon refilling apparatus featuring a tube fitting with a pushrod and operating mechanism that can connect to both types of gas cylinders, allowing for efficient refilling by piercing the diaphragm or detaching the valve core, and utilizing a reset spring to seal the cylinder post-refill, preventing backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate refilling apparatuses are used for diaphragm-sealed and valve core-sealed gas cylinders, then each cylinder type can be properly opened, but the device complexity increases and ease of operation deteriorates
Solution Approach 1:
The pushrod is designed with a universal structure that can perform multiple functions: it can pierce diaphragms in diaphragm-sealed cylinders and push valve cores in valve core-sealed cylinders. This single pushrod design eliminates the need for separate refilling apparatuses for different cylinder types, reducing device complexity while maintaining the ability to properly open both cylinder types.
2Ease of operation
If a universal refilling apparatus is designed to work with both cylinder types, then ease of operation improves, but the difficulty of detecting and measuring different sealing mechanisms increases
Solution Approach 1:
The system allows the operator to manually determine the cylinder type and select the appropriate opening method. The pushrod design inherently adapts to the detected sealing mechanism through manual operation - the operator observes the cylinder type and manually activates the appropriate function (piercing for diaphragm, pushing for valve core), eliminating the need for automatic detection systems.
3Productivity
If the gas cylinder is opened easily, then refilling speed increases, but gas leakage and environmental pollution worsen
Solution Approach 1:
The pushrod is designed to pierce the diaphragm or push the valve core at the precise moment when the gas cylinder is connected to the refilling apparatus, before any potential leakage can occur. This preliminary activation ensures immediate gas flow control through the established refilling pathway, enabling fast refilling while preventing gas escape to the environment.
Solution Approach 2:
The pushrod acts as an intermediary mechanism that controls the opening action. By manually activating the pushrod only when the cylinder is properly connected and ready for refilling, the system ensures that gas is channeled through the controlled refilling pathway rather than leaking into the environment, thus enabling fast refilling while preventing pollution.
Data Source
AI summary
The present Freon refilling apparatus for vehicles comprises a tube fitting and a refilling duct. The tube fitting is connected to the refilling duct. The lower end of the tube fitting has a connection port to connect with gas cylinders. A pushrod is movably inserted into the tube fitting in its axial direction. Between the tube fitting and the upper end of the pushrod, there is an operating mechanism which can push the pushrod down to the lower end of the tube fitting. When the pushrod moves downwards, its lower end can make the gas cylinder connected to the tube fitting. The present Freon refilling apparatus for vehicles is applicable to different types of gas cylinders storing Freon. This provides a more convenient way to refill Freon for automobile air conditioners, with a lower cost.