Housing material research The shell material is made of carbon steel pipe for pressure pipe, which has the same thickness as the commercial casing. Therefore, it is ensured that the casing can withstand pressure against the pressure difference. Imagine that because of the large pressure difference, the refrigerant will increase the leakage and reduce the performance. In order to improve its performance, it is necessary to set a smaller gap. In order to minimize the amount of deformation due to the pressure difference, a two-dimensional linear analysis of the most affected crankshaft and blades is required. In the section of the crankshaft, the deformation is the largest. Therefore, the shape of the upper and lower eccentric portions has to be changed to increase the shape of the two-dimensional moment of the section. The split of the first-stage discharge gas is considered to be an intermediate pressure, and it is conceivable that the portion of the mechanism for forming the high-pressure secondary compression may be deteriorated in lubricity and sealing due to insufficient oil supply. Moreover, since the discharged high-pressure secondary gas is directly discharged to the outside of the casing, the amount of residual oil in the casing is also reduced.
The newly designed compressor, by diverting the primary exhaust, ensures oil supply to the secondary compression mechanism and ensures residual oil in the housing. The basic structure of the compressor is based on the above research. The longitudinal section of the newly developed compressor has the same dimensions as the compressor. The size of the compressor is roughly the same as that of the compressor used in home air conditioners. The structure of the compressor is also the same as that of the commercial two-cylinder rotary compressor. The two slewing mechanisms are interlocked by the phase difference of one crankshaft, and are driven by a motor provided at the upper portion of the crankshaft. In addition, it is equipped with a DC variable frequency motor that can operate over a wide range.
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