Adjustable Expansion Valve for Multi-Capacity Refrigeration Systems
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Solution Overview
Problem
Refrigeration systems require multiple expansion devices with different capacities, leading to complex design and supply chain management, as existing expansion devices are not versatile or easily installable across various air conditioner units.
Innovation Solution
An adjustable expansion device with a motor assembly that moves an adjustable valve to a predetermined stop position, allowing for easy configuration and installation between indoor and outdoor heat exchangers, enabling the same device to be used across multiple unit capacities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple different copper capillary tube assemblies are used for different air conditioner models, then system performance is optimized for each model, but device complexity and supply chain management become complicated
Solution Approach 1:
The patent applies universality by designing a single adjustable expansion device that can be used across multiple air conditioner models with different capacities. The device includes an adjustable valve mechanism that allows it to be configured for different refrigerant flow requirements, eliminating the need for multiple different expansion device models and simplifying the supply chain while maintaining optimal system performance for each application.
Solution Approach 2:
The patent applies dynamics by incorporating an adjustable valve mechanism that can be modified after installation. The valve position can be changed to accommodate different air conditioner capacities and refrigerant flow requirements, transforming a static expansion device into a dynamic one that adapts to various system configurations.
2Reliability
If multiple different expansion devices are procured and stored for different models, then proper refrigerant flow regulation is achieved, but manufacturing and inventory costs increase
Solution Approach 1:
The adjustable expansion device serves multiple functions across different air conditioner models, allowing manufacturers to procure and store only one type of device rather than maintaining inventory of multiple different expansion devices. This universal device maintains proper refrigerant flow regulation through its adjustable mechanism, thereby reducing manufacturing and inventory costs.
3Reliability
If different sizes and types of expansion devices are used for various capacities, then optimal cooling performance is achieved, but installation complexity increases
Solution Approach 1:
The adjustable valve mechanism allows the same expansion device to be installed in various air conditioner models and then configured for optimal cooling performance. This eliminates the need for technicians to identify and install different sized devices, simplifying the installation process while maintaining optimal cooling performance through post-installation adjustment.
Solution Approach 2:
The expansion device is designed with an adjustable valve that can be configured after installation to the appropriate position for the specific air conditioner model. This preliminary configurability eliminates the need for complex pre-selection and pre-installation procedures, making installation easier while ensuring optimal performance.
Data Source
AI summary
A sealed system and a method of assembling the sealed system include installing an expansion device such as an electronic expansion valve (EEV) between an indoor heat exchanger and an outdoor heat exchanger. Before or after the expansion device is installed, a predetermined stop position of an adjustable valve is determined, e.g., based on the sealed system capacity. A removable motor assembly moves the adjustable valve to the predetermined stop position and the adjustable valve is permanently fixed within the expansion device, e.g., by removing the motor assembly and/or melting a locking member positioned within the expansion device.