The sound level of air conditioning units is becoming increasingly more important to the OEM unit manufacturer and the end user of the product. Invariably, the compressor is a significant contributor to the overall sound. This paper will discuss the analysis techniques and ultimate results of redesigning a hermetic compressor housing with the goal of lowering the sound. level. The redesign proc...

Based on the experimental work of a refrigerator compressor with soft suction structures, the new soft suction structures were put forward. The performance of the compressor and the frequency properties of noise were also studied by means of tests. The results showed that these structures could reduce the noise of compressor. The main experiments included refrigeration capacity, COP, vibration,...

Excessive vibration of complex structures in a multi-excitation environment is an arduous problem. Especially reciprocating compressor, how to quickly and accurately position the sources, analyze excitation features take effective solutions great significance safe stable operation compressor. In this paper, problem excessive air-cooled heat exchanger used variable speed CH4 compressor was studi...

The adjustment and control mode of frequency conversion for an air-conditioner can make the refrigeration capacity adapt the variety of its load very well. Thus, it has many advantages such as low variety in in-door temperature, short time to reach the wished temperature, low energy consumption, low start electric current and low strike to electric source etc. This mode is widely used in room a...

Reciprocating compressors are widely used in industry for various purposes and faults occurring in them can degrade their performance, consume additional energy and even cause severe damage to the machine. Vibration monitoring techniques are often used for early fault detection and diagnosis, but it is difficult to prescribe a given set of effective diagnostic features because of the wide varie...

Concept of Safe diagram was introduced 30 years ago (Singh and Schiffer, 1982) for the analysis of the vibration characteristics of packeted bladed disc for steam turbines. A detailed description of Safe diagram for steam turbine blades was presented 25 years ago in the 17 th Turbo Symposium (Singh et. el, 1988). Since that time it has found application in the design and failure analysis of man...