The heart of the cold water machine

Industrial cold water machine mainly by the compressor, evaporator, condenser, expansion valve, and other accessories, and one of the compressor is compared to the human heart, occupy a pivotal position in the whole system.

Low gas promoted to high pressure gas compressor is a kind of driven fluid machinery. Refrigeration system is the system of the heart, it's from the suction suction low temperature low pressure refrigerant gas, by clicking on the run after a piston to compress, like exhaust pipes, high temperature and high pressure gas to power refrigeration cycle, so as to realize compression, condensation, expansion, evaporation refrigeration cycle.

Compressor is divided into screw compressor, piston compressor, centrifugal compressor, etc. Screw compressor is divided into single screw compressor and dual screw compressor. Single screw compressor is zine developed in France in the 70 s, because this kind of compressor structure is more reasonable than before, so the rapid application in the field of national defense, and be protected, the technology is relatively independent. Double screw compressor first put forward by German in 1878, until 1934, the Swedish royal institute of technology (MIT) a. ysholm laid the SRM screw compressor technology, started in industry application, and has achieved rapid development.

Usually what we call the screw compressor is double screw compressor, compared to other types of compressor, screw compressor has the following some a bit:

High reliability. Screw compressor parts less, no wearing parts, and so he reliable operation, long service life.

Operation and maintenance is convenient.

Dynamic balance is good. Especially suitable for used as a mobile compressor, small volume, light weight, covers an area of less.

Strong adaptability. Screw compressor with the characteristics of a compulsory gas volume flow is almost not affected by the exhaust pressure, in a broad range of internal energy to keep high efficiency, under the condition of the compressor structure do not change, is applicable to a variety of working medium.

Multiphase mixed lose. Screw compressor rotor actually gaps between tooth surfaces, thus capable of liquid shock, can deliver a liquid gas, dust, easy aggregation gas, etc.

, of course, he also has shortcomings, such as high cost, can not be used in high-pressure situations and miniature occasions and so on. Technology research, however, have been to continue to believe that the screw compressor will be more and more perfect.