Adjustable Refrigeration Test Volume for Compressor Start Assessment
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Solution Overview
Problem
The automation level of testing starting characteristics of variable frequency compressors in refrigeration appliances is low, making it difficult to accurately measure parameters such as interphase voltage, phase current, vibration acceleration, suction and exhaust pressure, which hinders the assessment of starting characteristics.
Innovation Solution
A device and method with an adjustable system volume, utilizing a dual-environment structure, high-voltage and low-voltage terminal volume adjusters, and condensing coils to simulate different operating conditions, combined with a test control system for precise parameter measurement and assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dual-environment structure with adjustable system volume is used, then measurement precision of starting characteristics is improved, but device complexity increases
Solution Approach 1:
The testing device is divided into two independent assembly stations: a normal-temperature assembly station and a high-temperature assembly station. Each station has its own environment box (normal-temperature environment box and high-temperature environment box) with independent temperature control systems. This segmentation allows simultaneous testing under different temperature conditions while maintaining measurement precision for starting characteristics parameters.
Solution Approach 2:
The refrigeration system incorporates adjustable system volume through variable volume devices including a low-voltage terminal volume valve with low-voltage terminal volume adjuster, and a high-voltage terminal volume valve with high-voltage terminal volume adjuster. The condensing chamber includes selectable condensing coils (large condensing coils with valve, small condensing coils with valve) that can be dynamically configured to match different cooling capacity ranges, enabling accurate measurement across varying operating conditions.
2Adaptability or versatility
If system volume is made adjustable to match different cooling capacity ranges, then adaptability is improved, but device complexity increases
Solution Approach 1:
The refrigeration system incorporates adjustable system volume through variable volume devices including a low-voltage terminal volume valve with low-voltage terminal volume adjuster, and a high-voltage terminal volume valve with high-voltage terminal volume adjuster. The condensing chamber includes selectable condensing coils (large condensing coils with valve, small condensing coils with valve) that can be dynamically configured to match different cooling capacity ranges, enabling accurate measurement across varying operating conditions.
Solution Approach 2:
The testing device is designed with universal functionality to test variable frequency compressors across different cooling capacity ranges (50W-500W, 500W-1000W, 1000W-1500W, 1500W-2000W, 2000W-2500W). The system can accommodate different tested samples (variable frequency compressor and variable frequency driver) in either normal-temperature or high-temperature environment boxes, providing multi-environment testing capability within a single integrated device.
Data Source
AI summary
The present disclosure relates to the technical field of compressor performance tests and detection apparatus manufacturing, and discloses a device and method for testing starting characteristics of a refrigeration compressor with adjustable system volume. The device includes tested samples, a test refrigeration system and a test control system. The testing device realizes accurate adjustment of volume of the refrigeration system by means of control of a high-voltage terminal volume adjuster, a low-voltage terminal volume adjuster and condensing coils, and matches test requirements of different compressors for the volume of the refrigeration system, such that a substitute refrigeration system with adjustable volume is provided for testing the starting characteristics.